The food of rig (Mustelus lenticulatus) and the relationship of feeding to reproduction and condition in Golden Bay
作者:
KenJ. King,
MalcolmR. Clark,
期刊:
New Zealand Journal of Marine and Freshwater Research
(Taylor Available online 1984)
卷期:
Volume 18,
issue 1
页码: 29-42
ISSN:0028-8330
年代: 1984
DOI:10.1080/00288330.1984.9516026
出版商: Taylor & Francis Group
关键词: Mustelus lenticulatus;rig;feeding;reproduction;condition;migration pattern;Golden Bay
数据来源: Taylor
摘要:
The feeding of rig(Mustelus lenticulatus)from Golden Bay, north‐western Nelson was investigated in relation to condition, reproduction, and migration patterns. Prey importance was assessed by an index of relative importance (IRI). Prey composition was further examined by cluster analysis. Feeding intensity was assessed by weight of stomach contents as a percentage of body weight, and by mean number of prey consumed. Rig fed predominantly on benthic invertebrates (pagurid and brachyuran crustaceans, and echiurans). Inshore migration of females in summer did not appear to be related to feeding in order to gain condition for reproduction. It is suggested that males move inshore to mate. Golden Bay could act as a nursery ground for juvenile rig, providing food and protection from predation.
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