

FOLLOWUS
1.State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
2.Yangtze River Fisheries Research Institute, Chinese Academy of Fisheries Science, Wuhan 430223, China
3.Department of Biology, Norwegian University of Science and Technology, 7491 Trondheim, Norway
ZHANG Tanglin, tlzhang@ihb.ac.cn
收稿:2017-03-12,
录用:2017-6-9,
网络首发:2017-07-03,
纸质出版:2018-07
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朱挺兵, 张丽红, 张堂林, 等. Preliminarily study on the maximum handling size, prey size and species selectivity of growth hormone transgenic and non-transgenic common carp
Tingbing ZHU, Lihong ZHANG, Tanglin ZHANG, et al. Preliminarily study on the maximum handling size, prey size and species selectivity of growth hormone transgenic and non-transgenic common carp
朱挺兵, 张丽红, 张堂林, 等. Preliminarily study on the maximum handling size, prey size and species selectivity of growth hormone transgenic and non-transgenic common carp
Tingbing ZHU, Lihong ZHANG, Tanglin ZHANG, et al. Preliminarily study on the maximum handling size, prey size and species selectivity of growth hormone transgenic and non-transgenic common carp
The present study preliminarily examined the differences in maximum handling size
prey size and species selectivity of growth hormone transgenic and non-transgenic common carp
Cyprinus carpio
when foraging on four gastropods species (
Bellamya aeruginosa
Radix auricularia
Parafossarulus sinensis
and
Alocinma longicornis
) under laboratory conditions. In the maximum handling size trial
five fish from each age group (1-year-old and 2-year-old) and each genotype (transgenic and non-transgenic) of common carp were individually allowed to feed on
B. aeruginosa
with wide shell height range. The results showed that maximum handling size increased linearly with fish length
and there was no significant difference in maximum handling size between the two genotypes. In the size selection trial
three pairs of 2-year-old transgenic and non-transgenic carp were individually allowed to feed on three size groups of
B. aeruginosa
. The results show that the two genotypes of
C. carpio
favored the small-sized group over the large-sized group. In the species selection trial
three pairs of 2-year-old transgenic and non-transgenic carp were individually allowed to feed on thin-shelled B. aeruginosa and thick-shelled
R. auricularia
and five pairs of 2-year-old transgenic and non-transgenic carp were individually allowed to feed on two gastropods species (
P. sinensis
and
A. longicornis
) with similar size and shell strength. The results showed that both genotypes preferred thin-shelled
Radix auricularia
rather than thick-shelled
B. aeruginosa
but there were no significant difference in selectivity between the two genotypes when fed on
P. sinensis
and
A. longicornis
. The present study indicates that transgenic and non-transgenic
C. carpio
show similar selectivity of predation on the size- and species-limited gastropods. While this information may be useful for assessing the environmental risk of transgenic carp
it does not necessarily demonstrate that transgenic common carp might have lesser environmental impacts than non-transgenic carp.
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