e-journal

Can timing of spawning explain the increase in egg size with female size in salmonid fish?

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A common observation is that egg size increases with maternal size within populations. Several
hypotheses have been proposed to explain this phenomenon. Most recently, it was suggested that the optimal egg size depends on female size due to correlations between (i) breeding time and egg size selection and (ii) female size and breeding time, and as such, the positive egg size–maternal size relationship represents an adaptive strategy. Here, we test the second of these two premises in two salmonid species, Atlantic salmon (Salmo salar) and coho salmon (Oncorhynchus kisutch) for which we have detailed breeding and egg size data. The body size of spawning females decreased throughout the season in coho salmon, but not in Atlantic salmon. Furthermore, we did not find a direct correlation between egg size and breeding time, which would also be expected if this premise was correct. Accordingly, breeding date does not appear to be as important as other factors in shaping among female differences in egg size.

Key words: Timing of breeding; offspring size selection; Salmo salar ; Oncorhynchus kisutch

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Ketersediaan

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Informasi Detail

Judul Seri

Ecology of Freshwater Fish

No. Panggil

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Penerbit

Norwey : John Wiley & Sons Ltd., 2015

Deskripsi Fisik

Ecology of Freshwater Fish 2015: 24: 23–31

Bahasa

English

ISBN/ISSN

doi: 10.1111/eff.121

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

2015: 24: 23–31

Subjek

PERIKANAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

Mutia/Agus

Versi lain/terkait

Lampiran Berkas

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