INVESTIGADORES
DIAZ DE ASTARLOA Juan Martin
congresos y reuniones científicas
Título:
Reproductive biology of species of Bathyraja (Chondrichthyes, Rajidae) on the Argentinean continental shelf
Autor/es:
SCENNA, L. B; BARBINI, S. A.; DÍAZ DE ASTARLOA, J. M.; FIGUEROA, D. E.; COUSSEAU, M. B.
Lugar:
New Orleans, USA
Reunión:
Congreso; 2006 Joint meeting of the American Society of Ichthyologists and Herpetologists; 2006
Resumen:
Skates have become the sixth most economically important fish resource (over a total of
46 commercial fish species) landed by commercial bottom-trawlers in Argentina.
Biological data of skates (especially on reproduction) are needed to improve
management of their fisheries. Despite the abundance and diversity of Bathyraja genus in
Argentinean waters (eight species), very little is known about its basic biology and
ecology. Specimens of Bathyraja brachyurops (n=383), B. macloviana (n=360), B.
albomaculata (n=229), B. magellanica (n=120), B. griseocauda (n=88), B. multispinis (n=29), B.
cousseauae (n=26) and B. scaphiops (n=16) were collected from research cruises carried out
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
cousseauae (n=26) and B. scaphiops (n=16) were collected from research cruises carried out
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
albomaculata (n=229), B. magellanica (n=120), B. griseocauda (n=88), B. multispinis (n=29), B.
cousseauae (n=26) and B. scaphiops (n=16) were collected from research cruises carried out
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
cousseauae (n=26) and B. scaphiops (n=16) were collected from research cruises carried out
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
Argentinean waters (eight species), very little is known about its basic biology and
ecology. Specimens of Bathyraja brachyurops (n=383), B. macloviana (n=360), B.
albomaculata (n=229), B. magellanica (n=120), B. griseocauda (n=88), B. multispinis (n=29), B.
cousseauae (n=26) and B. scaphiops (n=16) were collected from research cruises carried out
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
cousseauae (n=26) and B. scaphiops (n=16) were collected from research cruises carried out
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
albomaculata (n=229), B. magellanica (n=120), B. griseocauda (n=88), B. multispinis (n=29), B.
cousseauae (n=26) and B. scaphiops (n=16) were collected from research cruises carried out
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
cousseauae (n=26) and B. scaphiops (n=16) were collected from research cruises carried out
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
Bathyraja genus in
Argentinean waters (eight species), very little is known about its basic biology and
ecology. Specimens of Bathyraja brachyurops (n=383), B. macloviana (n=360), B.
albomaculata (n=229), B. magellanica (n=120), B. griseocauda (n=88), B. multispinis (n=29), B.
cousseauae (n=26) and B. scaphiops (n=16) were collected from research cruises carried out
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT). The length at which 50% of the skates were sexually mature (LT50) was
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
estimated from a logistic ogive fitted to the data using maximum-likelihood approach.
Females of B. brachyurops and B. macloviana matured at a larger size than males, while
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
both sexes of the other two species appeared to attain sexual maturity at about the same
LT. LT50 in both sexes of the four species was achieved at >75% of the maximum LT
cousseauae (n=26) and B. scaphiops (n=16) were collected from research cruises carried out
by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Argentina)
since 2003. Study area extended along Argentinean continental shelf between 36°S and
55°S. Size at maturity of the four most abundant species was assessed from the
allometric growth pattern of uteri, oviducal glands and clasper with respect to total
length (LT