Size heterogeneity, growth potential and aggression in juvenile yellowtail kingfish (Seriola lalandi Valenciennes)
(2007) In Aquaculture Research 38(12). p.1254-1264- Abstract
- The ontogenetic development of size heterogeneity and aggression was monitored in commercial culture tanks of yellowtail kingfish (Seriola lalandi Valenciennes). Size heterogeneity increased substantially with the introduction of Artemia as a food source at 12 days post-hatch (DPH), and was correlated with the appearance of aiming behaviour, a precursor to more direct aggressive interactions. Chasing behaviour started at approximately 19 DPH (10-12 mm total length), with the main aggressors being large-grade individuals comprising 8% of the population. At any one time, only 10-30% of this grade carried out all of the chases, meaning that a very small proportion of the entire population (1%) was responsible for most of the aggressive... (More)
- The ontogenetic development of size heterogeneity and aggression was monitored in commercial culture tanks of yellowtail kingfish (Seriola lalandi Valenciennes). Size heterogeneity increased substantially with the introduction of Artemia as a food source at 12 days post-hatch (DPH), and was correlated with the appearance of aiming behaviour, a precursor to more direct aggressive interactions. Chasing behaviour started at approximately 19 DPH (10-12 mm total length), with the main aggressors being large-grade individuals comprising 8% of the population. At any one time, only 10-30% of this grade carried out all of the chases, meaning that a very small proportion of the entire population (1%) was responsible for most of the aggressive interactions. The main recipients of aggression were the small grade, comprising 42% of the population, while the medium grade (50% of the population) were generally not aggressive and received only a low to moderate level of aggression. A grading trial showed that large-grade juveniles only displayed aggressive behaviour in the presence of size heterogeneity, and that medium- or small-grade juveniles did not establish an agonistic hierarchy in the absence of large individuals. A high level of aggression in the ungraded control treatment was associated with mortality of most of the small individuals. Even in the absence of aggression, the small-grade juveniles failed to gain weight or show an increase in the RNA/DNA ratio after 12 days. The large- and medium-grade larvae showed an isometric increase in RNA/DNA ratio during development, indicating that faster-growing individuals are likely the result of better food capture or processing traits rather than better protein synthesis rates. Decreasing size heterogeneity and aggression via grading mostly benefits the medium-grade individuals, as the majority of small individuals within a batch appear to be on a degenerative developmental trajectory irrespective of an aggressive environment. 15-20 individuals measured for total length or weight (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1981405
- author
- Moran, Damian LU
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- aggression, size heterogeneity, growth, RNA/DNA ratio
- in
- Aquaculture Research
- volume
- 38
- issue
- 12
- pages
- 1254 - 1264
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- scopus:34548317508
- ISSN
- 1365-2109
- DOI
- 10.1111/j.1365-2109.2007.01769.x
- language
- English
- LU publication?
- no
- id
- 63cf1659-6beb-4013-944e-922945e920a9 (old id 1981405)
- alternative location
- http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-2109.2007.01769.x
- date added to LUP
- 2016-04-01 12:21:32
- date last changed
- 2022-03-05 22:27:40
@article{63cf1659-6beb-4013-944e-922945e920a9,
abstract = {{The ontogenetic development of size heterogeneity and aggression was monitored in commercial culture tanks of yellowtail kingfish (Seriola lalandi Valenciennes). Size heterogeneity increased substantially with the introduction of Artemia as a food source at 12 days post-hatch (DPH), and was correlated with the appearance of aiming behaviour, a precursor to more direct aggressive interactions. Chasing behaviour started at approximately 19 DPH (10-12 mm total length), with the main aggressors being large-grade individuals comprising 8% of the population. At any one time, only 10-30% of this grade carried out all of the chases, meaning that a very small proportion of the entire population (1%) was responsible for most of the aggressive interactions. The main recipients of aggression were the small grade, comprising 42% of the population, while the medium grade (50% of the population) were generally not aggressive and received only a low to moderate level of aggression. A grading trial showed that large-grade juveniles only displayed aggressive behaviour in the presence of size heterogeneity, and that medium- or small-grade juveniles did not establish an agonistic hierarchy in the absence of large individuals. A high level of aggression in the ungraded control treatment was associated with mortality of most of the small individuals. Even in the absence of aggression, the small-grade juveniles failed to gain weight or show an increase in the RNA/DNA ratio after 12 days. The large- and medium-grade larvae showed an isometric increase in RNA/DNA ratio during development, indicating that faster-growing individuals are likely the result of better food capture or processing traits rather than better protein synthesis rates. Decreasing size heterogeneity and aggression via grading mostly benefits the medium-grade individuals, as the majority of small individuals within a batch appear to be on a degenerative developmental trajectory irrespective of an aggressive environment. 15-20 individuals measured for total length or weight}},
author = {{Moran, Damian}},
issn = {{1365-2109}},
keywords = {{aggression; size heterogeneity; growth; RNA/DNA ratio}},
language = {{eng}},
number = {{12}},
pages = {{1254--1264}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Aquaculture Research}},
title = {{Size heterogeneity, growth potential and aggression in juvenile yellowtail kingfish (Seriola lalandi Valenciennes)}},
url = {{http://dx.doi.org/10.1111/j.1365-2109.2007.01769.x}},
doi = {{10.1111/j.1365-2109.2007.01769.x}},
volume = {{38}},
year = {{2007}},
}