Total egg production in trisopteurs luscus: effect of stock structure copia
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This document examines the total egg production of the pouting fish (Trisopterus luscus) and the effect of population structure. It presents a model to estimate total stock egg production using empirical data on fecundity, spawning frequency, and the length of the spawning season. The model estimates egg production under both determinate and indeterminate spawning assumptions. The results show that indeterminate spawning leads to higher estimated total egg production than determinate spawning. The conclusions state that an imbalanced population size structure can lower total egg production, and accurate knowledge of reproductive parameters is important for estimating egg production.
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1. What does sex-role reversed mean? Why do the authors claim that the dusky pipefish is sex-
role reversed?
2. Data on the MS:RS relationship appear in Figure 1 (and Table 1), along with data from
Bateman\'s original Drosophilia study. Which groups had positive Bateman gradients? How do
the pipefish gradients compare to the fruit fly gradients?
3. Were pipefish Bateman gradients consistent through every treatment? What happened when
males outnumbered females? Why? THE ROYAL SOCIETY The Bateman gradient and the
cause of sexua selection in a sex-role-reversed pipefish Adam G. Jone Gunilla Rosenqvist
Anders Berglund Stevan J. Arnold and John C. Avi Department of Genetics, University of
Georgia, Athens, GA 30602, USA Departmenl of Roology, No niversily of S d echnology, N-
7491 Trondh rategian Department of Animal Ecology, Upps ala Univers ity, Norbyaagen 18d, S-
752.36 Uppsala, Saveden Department of Koology, Oregon State University, Corvallis, OR
9733l, USA As a conspicuous evolutionary mechanism, sexual selection has received much
attention from theorists empiricists. Altha the of th ng bee e mating system to see oudg
mportance Select appreciated, the precise relationship remains obscure. In a classic experimental
study based on parentage using visible genctic markers, more than 50 years ago A. Bateman
proposed that the causc assessment of sexual selection in Drosophila is the stronger correlation
es (relative to females between number n ma of mates and fertility (number of progeny Half a
century later, molecular genetic techniques for al tests of the \"Bateman gradient using sex assigi
g pare ge now perm age experime rolc-reversed species cre we show tha n the male-pregnant
pipefish Syngnathus typhle, females exhibi ve association between number of matcs and fertility
than do mal lcs and that this relation ronger posi ship respond s in the predicted fashion to
changes in the adult sex ratio. These findings give empirical support to the idea that the
relationship between mating success and numbe of progeny, as characteriz by the Bateman
gradient, al feature of the genetic g system affecting he strength and S a Centri direction of
sexual selection Keywords Songnadhus lyphle; rcprod csi sexual sclcction matin successi
microsatc uctive success Drosoph a males, the relationsh p b etween mat g success 1.
INTRODUCTION nd fertility appears such that a male\'s reproduc near. In recent years,
numcrous papcrs havc proposc d various mit cd primarily by thc numbcr of timcs Suc CCSS is
ants of sexual on including parental invest mate. However, for females the relationshi is eller
Selec le Ca ment (Trivers 1972; Parker & Simmons 1996, the much differen welling off afuer a
single mating. Thus ly by their rational sex ratio (Emlen & O g 1977; Kvarnemo & females nsic
capacity to Opel are uce eggs and gain ver Ahnesio 1996), variance \'ayne ittle n terms of offsp n
reproductive success ring 979; Wade & Arnold 1980) and potential numbcrs) by mating with
multiple.
Egg quality characteristics and phenotypic correlations among egg quality tra...
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Chapter 2
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Chapter 3
Surveying: Object Principles & Types of Surveying; Site Plans, Plans & Maps; Scales & Unit of different Measurements.
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1. Palancharmy, Basic Civil Engineering, McGraw Hill publishers.
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Total egg production in trisopteurs luscus: effect of stock structure copia
- 1. Total egg production in Trisopteurs luscus : effect of stock structure Alexandre Alonso-Fernández and Fran Saborido-Rey
- 3. Stock Reproductive Potencial in stock assessment Stock/Recruitment relationships Represent the fundamental relationship between parental and offspring population =>basic tool in actual fisheries management. 2 Introducción
- 4. Stock Reproductive Potencial in stock assessment Stock/Recruitment relationships Represent the fundamental relationship between parent and offspring population =>basic tool in actual fisheries management. SSB is the traditional indicator of the reproductive capacity of the population. 2 Introducción
- 5. Stock Reproductive Potencial in stock assessment Stock/Recruitment relationships Represent the fundamental relationship between parent and offspring population =>basic tool in actual fisheries management. SSB is the traditional indicator of the reproductive capacity of the population. 2 Marshall et al. 1998; Kraus et al. 2002; Marteinsdottir and Begg 2002; ... Introducción
- 6. 3 “ Stock Reproductive Potential” (SRP): “the annual variation in a stock’s ability to produce viable eggs and larvae that may eventually recruit to adult population or fishery” (Trippel 1999) ¿SSB a good estimator of SRP? Kjesbu et al. 1991; Solemdal 1997; Marshall et al. 1998; Vallin and Nissling 2000;; … Flemish Cap Cod (Saborido Rey et al. 2004) Introducción
- 7. 995 tons >1.7 millon euros Trisopterus luscus (Linnaeus 1758) http://www.pescadegalicia.com 4 Introducción pouting
- 8. Trisopterus luscus (Linnaeus 1758) 5 Introducción
- 9. Material and Methods Sampling 6
- 16. 11 Results and Discussion Egg production Model Determinate TEP det = [N * (PF - AL) * SR * M] l Indeterminate TEP indet = [N * (BF * NB) * SR * M] l
- 17. 12 Results and Discussion Egg production Model Determinate TEP det = [N * (PF - AL) * SR * M] l Potential Fecundity = 4.718e-06·Length 4.397
- 18. 13 Results and Discussion SSB TEP Weight = 7E-06Length 3.087 Potential Fecundity = 4.718e-06·Length 4.397
- 19. 14 Results and Discussion Egg production Model Determinate TEP det = [N * (PF - AL) * SR * M] l
- 20. 15 Results and Discussion Egg production Model Indeterminate TEP indet = [N * (BF * NB) * SR * M] l Batch Fecundity = 0.003·Length 2.710
- 21. 16 Results and Discussion Egg production Model Indeterminate TEP indet = [N * (BF * NB) * SR * M] l Number of Batches Spawning frequency Length of spawning season S ~ 3, captivity experiment (Alonso-Fernández et al. 2010)
- 22. 17 Results and Discussion Length of spawning season Onset Final Alonso-Fernández and Saborido Rey, In press
- 23. 17 Results and Discussion Length of spawning season Alonso-Fernández and Saborido Rey, In press
- 24. 18 Results and Discussion SSB
- 25. 19 Results and Discussion 877 x 10 9 1384 x 10 9 1854 x 10 9 3373 x 10 9 Determinate Indeterminate
- 26. 20 Results and Discussion Egg quality
- 27. 21 Results and Discussion 877 x 10 9 1384 x 10 9 1854 x 10 9 3373 x 10 9 Determinate Indeterminate
- 28. 21 Results and Discussion Indeterminate Indeterminate
- 31. Thank you