Affiliation:
1. Deep Sea and Polar Fisheries Research Center, Key Laboratory of Mariculture, Ministry of Education, College of Fisheries, Ocean University of China
Abstract
Abstract
Macrourus caml is a main by-catch in the Southern Ocean fishery, and a main prey species of Antarctic toothfish, which plays an important role in Southern Ocean ecosystem. In this study, age estimation and stomach content analysis were conducted by using samples collected from the Cosmonauts Sea in 2021. The main objectives of this study were to estimate the age and diet of grenadier Macrourus caml and to explore the feeding habits of Macrourus caml. Stomach content analysis showed that Macrourus caml mainly fed on Malacostraca and Sagittoidea, especially the Malacostraca accounting for over 50%. The feeding habits of male and female Macrourus caml were similar. Before maturation, Macrourus caml mainly fed on Malacostraca and Cnidaria. After maturation, Macrourus caml mainly fed on algae, Malacostraca and Sagittoidea. The feeding bias decreased and the feeding range became wider with aging. The results would provide reference for exploring the nutritional status of Antarctic benthic fish in the ecosystem.
Publisher
Research Square Platform LLC
Reference41 articles.
1. A quantitative theory of organic growth;Bertalanffy LV;Human Biology,1938
2. Age and growth in a temperate euryhaline notothenioid, Eleginops maclovinus from the Falkland Islands;Brickle P;Journal of the Marine Biological Association of the UK,2005
3. Life history of northern Gulf of Mexico Warsaw grouper Hyporthodus nigritus inferred from otolith radiocarbon analysis;Barnett BK;PLOS ONE,2020
4. Otolith shape as a tool for species identification of the grenadiers Macrourus caml and M. whitsoni;Bradley R;Fisheries Research,2022
5. Comparison of age readings from scales and otoliths of the Patagonian toothfish (Dissostichus Eleginoides) from South Georgia;Cassia MC;CCAMLR Science,1998