Feeding, somatic condition and survival of sand lance Ammodytes sp. larvae in Mutsu Bay, Japan
| Autor: | Toyomi Takahashi, Kingo Itoh, Tetsuya Takatsu, Kazuo Imura, Nobuaki Nanjo, Yuuhei Takeya |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Larva biology Ecology 010604 marine biology & hydrobiology Ammodytes fungi Sand lance 04 agricultural and veterinary sciences Aquatic Science biology.organism_classification 01 natural sciences Ammodytes sp Predation Animal science 040102 fisheries 0401 agriculture forestry and fisheries Water density Bay Copepod |
| Zdroj: | Fisheries Science. 83:199-214 |
| ISSN: | 1444-2906 0919-9268 |
| DOI: | 10.1007/s12562-016-1054-0 |
| Popis: | To clarify the recruitment process of sand lance Ammodytes sp., we investigated larval condition factor, relative gut fullness (%GF), prey abundance and oceanographic structure in Mutsu Bay, Japan, during 1999–2001. Ammodytes sp. larvae, which were collected by horizontal hauls of Motoda nets and a ring net at depths of 1, 10, 20, 30 and 40 m, were mainly distributed at 10–30 m. Larvae at the first feeding time until 12 mm in body length (BL) fed predominantly on copepod nauplii, whereas large larvae with BL of 12.1–14.0 mm fed on a mixture of copepod nauplii, copepodites and appendicularians from late February to April. A path analysis showed that difference in water density between 35- and 5-m depths negatively affected naupliar abundance at 10–30-m depth (standardised path coefficient β = −0.71, p = 0.005 for 3.3–8.0-mm BL larvae and β = −0.78, p |
| Databáze: | OpenAIRE |
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