open access

https://hdl.handle.net/2115/82800

First Report of Zeuxo sp. (Crustacea: Tanaidacea) as Prey for the Forktongue Goby, Chaenogobius annularis Gill, 1859

日本語

2015-03

利尻町立博物館

Rishiri Studies

34

1-6

A tanaidacean species (Zeuxo sp.) was found as a prey item in the stomach of the forktongue goby (Chaenogobius annularis), along with two gammarids. The tanaidacean prey was significantlty male biased (binomial test, P = 0.0094), comprising 20 males and six females, whereas the sex raatio in animals collected from environmental substrata by washing seaweeds, mussels, and rock surfaces was not significantly biased (binomial test, P = 0.4763; 93 males, 104 femaqles, and 30 unisexed mancae). ANOVA by sex showed that the males in the stomach were significantly larger than male3s from the environment (df = 1, F = 30.11, P < 0.001); there was no significant difference for females (df = 1, F = 1.555, P = 0.215). These results suggest that the goby shows prey-size preference, perhaps related to behavioral differences between male and female Zeuxo sp., as previously suggested for a comfamilial tanaidacean.

学術雑誌論文

Version of Record

0919-9160

AA11126844