𝔖 Bobbio Scriptorium
✦   LIBER   ✦

On the (in)stability of dominance hierarchies in the cichlid fish Oreochromis mossambicus

✍ Scribed by Rui F. Oliveira; Vitor C. Almada

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
588 KB
Volume
22
Category
Article
ISSN
0096-140X

No coin nor oath required. For personal study only.

✦ Synopsis

Dominance hierarchies were studied during 8 weeks in eight heterosexual captive groups of Oreochromis mossarnbicus at the onset of sexual maturity. Linearity was assessed for each group on a weekly basis based on the Landau's index (h) and on the procedure described by Appleby [Appleby MC (1983): Animal Behaviour 31:600-608]. Week-toweek stability of the hierarchical structures was measured using the Burk's stability index (b) and Spearman rank correlation coefficients for the ranks of fishes in consecutive weeks. The two measures of stability showed a high level of concordance but the Spearman rank correlations were more conservative in detecting cases of stability. Although most dominance structures were linear they were unstable from week to week. Dominant individuals were less likely to experience rank reversals than subordinates. Rank reversals were especially likely among hierarchical neighbors. Dominance hierarchies did not stabilize in the time span of this study. 0

πŸ“œ SIMILAR VOLUMES

Maternal aggression during the mouthbroo
Maternal aggression during the mouthbrooding cycle in the Cichlid fish, Oreochromis mossambicus
✍ Rui F. Oliveira; Vitor C. Almada πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 76 KB

Maternal aggression was studied in Oreochromis mossambicus during the mouthbrooding cycle. Brooding females were observed in heterosexual captive groups, and their agonistic interactions and behavioural activities were registered. Brooding females were classified into three classes according to the

The neural basis of dominance hierarchy
The neural basis of dominance hierarchy formation in crayfish
✍ Donald H. Edwards; Fadi A. Issa; Jens Herberholz πŸ“‚ Article πŸ“… 2003 πŸ› John Wiley and Sons 🌐 English βš– 222 KB

## Abstract Fifty years of study of the nervous system and behavior of crayfish have revealed neural circuits for movements that are similar to those seen during formation of a dominance hierarchy. Given this background, it is of interest to ask what is understood about the neural substrates of dom

On the measurement of preferences in the
On the measurement of preferences in the analytic hierarchy process
✍ Ahti A. Salo; Raimo P. HΓ€mΓ€lΓ€inen πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 365 KB πŸ‘ 3 views

In this paper we apply multiattribute value theory as a framework for examining the use of pairwise comparisons in the analytic hierarchy process (AHP). On one hand our analysis indicates that pairwise comparisons should be understood in terms of preference differences between pairs of alternatives.

Time-course changes in the expression of
Time-course changes in the expression of Na, K-ATPase and the morphometry of mitochondrion-rich cells in gills of euryhaline tilapia (Oreochromis mossambicus) during freshwater acclimation
✍ Lin, Chia-Hao ;Huang, Chao-Lu ;Yang, Chi-Hwa ;Lee, Tsung-Han ;Hwang, Pung-Pung πŸ“‚ Article πŸ“… 2003 πŸ› John Wiley and Sons 🌐 English βš– 315 KB πŸ‘ 1 views

## Abstract Changes in expression of Na, K‐ATPase (NKA) and morphometry of mitochondrion‐rich (MR) cells in gills of tilapia were investigated on a 96–hr time course following transfer from seawater (SW) to fresh water (FW). A transient decline in plasma osmolality and Na^+^, Cl^βˆ’^ concentrations o