INVESTIGADORES
IRIBARNE Oscar Osvaldo
artículos
Título:
Changes in the feeding behavior of the deposit feeder polychaete Laeonereis acuta on soft-sediments inhabited by burrowing crabs.
Autor/es:
PALOMO, G; P. MARTINETTO; O. IRIBARNE
Revista:
MARINE BIOLOGY
Editorial:
Springer Verlag
Referencias:
Lugar: Berlin; Año: 2004 vol. 145 p. 641 - 649
ISSN:
0025-3162
Resumen:
Abstract In this paper, we evaluate the influence of the
burrowing crab Chasmagnathus granulatus on the feeding
behavior, body condition, burrowing activity, and
fecal production of the deposit-feeding polychaete Laeonereis
acuta. Previous results and ours show that, due
to crab activity, sediment organic matter decreases with
depth outside a crab bed, but there were no differences
inside. Also, particle sizes were smaller inside the crab
bed. Polychaetes showed better body condition inside
the crab bed, suggesting higher energy gain. They fed on
the surface more frequently outside the crab bed than
inside. However, feeding rate was higher inside the crab
bed, which is consistent with the larger weight and volume
of fecal pellets found inside crab bed. In both areas,
the bedload sediment transport was not similar to the
sediment ingested by this polychaete. A 1-month exclusion/
inclusion experiment performed outside and inside
the crab bed showed that the body condition of polychaetes
changed between areas but that this was not
directly due to crab manipulation. Thus, our results
suggest that the higher sediment quality inside a crab
bed can positively affect the feeding behavior of the
deposit-feeding polychaete L. acuta, increasing itsIn this paper, we evaluate the influence of the
burrowing crab Chasmagnathus granulatus on the feeding
behavior, body condition, burrowing activity, and
fecal production of the deposit-feeding polychaete Laeonereis
acuta. Previous results and ours show that, due
to crab activity, sediment organic matter decreases with
depth outside a crab bed, but there were no differences
inside. Also, particle sizes were smaller inside the crab
bed. Polychaetes showed better body condition inside
the crab bed, suggesting higher energy gain. They fed on
the surface more frequently outside the crab bed than
inside. However, feeding rate was higher inside the crab
bed, which is consistent with the larger weight and volume
of fecal pellets found inside crab bed. In both areas,
the bedload sediment transport was not similar to the
sediment ingested by this polychaete. A 1-month exclusion/
inclusion experiment performed outside and inside
the crab bed showed that the body condition of polychaetes
changed between areas but that this was not
directly due to crab manipulation. Thus, our results
suggest that the higher sediment quality inside a crab
bed can positively affect the feeding behavior of the
deposit-feeding polychaete L. acuta, increasing itsChasmagnathus granulatus on the feeding
behavior, body condition, burrowing activity, and
fecal production of the deposit-feeding polychaete Laeonereis
acuta. Previous results and ours show that, due
to crab activity, sediment organic matter decreases with
depth outside a crab bed, but there were no differences
inside. Also, particle sizes were smaller inside the crab
bed. Polychaetes showed better body condition inside
the crab bed, suggesting higher energy gain. They fed on
the surface more frequently outside the crab bed than
inside. However, feeding rate was higher inside the crab
bed, which is consistent with the larger weight and volume
of fecal pellets found inside crab bed. In both areas,
the bedload sediment transport was not similar to the
sediment ingested by this polychaete. A 1-month exclusion/
inclusion experiment performed outside and inside
the crab bed showed that the body condition of polychaetes
changed between areas but that this was not
directly due to crab manipulation. Thus, our results
suggest that the higher sediment quality inside a crab
bed can positively affect the feeding behavior of the
deposit-feeding polychaete L. acuta, increasing itsLaeonereis
acuta. Previous results and ours show that, due
to crab activity, sediment organic matter decreases with
depth outside a crab bed, but there were no differences
inside. Also, particle sizes were smaller inside the crab
bed. Polychaetes showed better body condition inside
the crab bed, suggesting higher energy gain. They fed on
the surface more frequently outside the crab bed than
inside. However, feeding rate was higher inside the crab
bed, which is consistent with the larger weight and volume
of fecal pellets found inside crab bed. In both areas,
the bedload sediment transport was not similar to the
sediment ingested by this polychaete. A 1-month exclusion/
inclusion experiment performed outside and inside
the crab bed showed that the body condition of polychaetes
changed between areas but that this was not
directly due to crab manipulation. Thus, our results
suggest that the higher sediment quality inside a crab
bed can positively affect the feeding behavior of the
deposit-feeding polychaete L. acuta, increasing its. Previous results and ours show that, due
to crab activity, sediment organic matter decreases with
depth outside a crab bed, but there were no differences
inside. Also, particle sizes were smaller inside the crab
bed. Polychaetes showed better body condition inside
the crab bed, suggesting higher energy gain. They fed on
the surface more frequently outside the crab bed than
inside. However, feeding rate was higher inside the crab
bed, which is consistent with the larger weight and volume
of fecal pellets found inside crab bed. In both areas,
the bedload sediment transport was not similar to the
sediment ingested by this polychaete. A 1-month exclusion/
inclusion experiment performed outside and inside
the crab bed showed that the body condition of polychaetes
changed between areas but that this was not
directly due to crab manipulation. Thus, our results
suggest that the higher sediment quality inside a crab
bed can positively affect the feeding behavior of the
deposit-feeding polychaete L. acuta, increasing itsL. acuta, increasing its
feeding rate and consequently enhancing its body
condition.