Multiple spawning and the dynamics of fish populations: inferences from an individual-based simulation model

Susan K Lowerre-Barbieri; James M Lowerre; Luiz R Barbieri

doi:10.1139/f98-105

Multiple spawning and the dynamics of fish populations: inferences from an individual-based simulation model

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f98-105 ◽

1998 ◽

Vol 55 (10) ◽

pp. 2244-2254 ◽

Cited By ~ 36

Author(s):

Susan K Lowerre-Barbieri ◽

James M Lowerre ◽

Luiz R Barbieri

Keyword(s):

Simulation Model ◽

Egg Production ◽

Adult Population ◽

Individual Variability ◽

Spawning Season ◽

Average Life Span ◽

Multiple Spawning ◽

Individual Based Simulation ◽

First Maturity ◽

Size At Age

We used an individual-based Monte Carlo simulation model to assess how aspects associated with multiple spawning (within a spawning season) affected survivorship, lifetime fecundity, cohort egg production, and yield-per-recruit of a highly exploited species. To make our model more realistic, we included and tested the effects of individual variability in growth and a seasonal growth pattern. Birth months influenced when fish first matured and became vulnerable to the fishery. There was a sixfold increase in mature fish at the beginning of their first spawning season associated with having been born early versus late the previous season. Early born fish had a lower average life-span than later born fish. Although early born fish had lower survivorship they produced the most eggs because of an early size at first maturity, low fishing mortality in the first year, and their larger size at age. These results suggest multiple spawning can have important implications for recruitment and adult population dynamics.

Batch or trickle: understanding the multiple spawning strategy of southern calamary, Sepioteuthis australis (Mollusca : Cephalopoda)

Marine and Freshwater Research ◽

10.1071/mf07200 ◽

2008 ◽

Vol 59 (11) ◽

pp. 987 ◽

Cited By ~ 2

Author(s):

Matthew R. Kuipers ◽

Gretta T. Pecl ◽

Natalie A. Moltschaniwskyj

Keyword(s):

Egg Production ◽

Reproductive Effort ◽

Developmental Stages ◽

Spawning Season ◽

The Other ◽

Lifetime Fecundity ◽

Multiple Spawning ◽

Maturation Stages ◽

Oocyte Stage ◽

Batch Spawning

Many cephalopods are ‘multiple spawners’; however, we know little about the timing and dynamics of egg production. This has implications for the allocation of energy to reproduction, lifetime fecundity and subsequent recruitment. The current study aimed to determine if Sepioteuthis australis (Quoy and Gaimard, 1832), which spawns multiple times, produces mature oocytes for deposition in a continuous trickle or in larger discrete batches. Throughout a spawning season, developmental stages were assigned to the ovaries of each female by combining macroscopic and histological analyses of the oocytes. Half of the females (46%) showed a significant peak in oocytes at one of the maturation stages, indicating that females were developing eggs in batches. It was hypothesised that the remaining females were also batch spawning, given that the oviduct weights of the remaining females (54%) were high and the other measured biological characteristics were similar to those of the females showing a peak in oocyte stage. Average batch fecundity declined over the 3-month spawning season, but total egg numbers in the ovary increased, suggesting that females might have deposited small batches more often during December. As reproduction requires large allocations of energy, understanding how females distribute reproductive effort throughout their lives is crucial to understanding the behaviour of populations, individuals and their offspring.

Diabetes Prevention Using a Simulation Model That Explains Individual Variability in Response to Diet Change

Diabetes ◽

10.2337/db18-1892-p ◽

2018 ◽

Vol 67 (Supplement 1) ◽

pp. 1892-P

Author(s):

JULIA H. CHEN ◽

MOMOKO FUKASAWA ◽

QIAN CHEN ◽

SAMUEL P. BURNS ◽

KEI KUMAR ◽

...

Keyword(s):

Simulation Model ◽

Diabetes Prevention ◽

Individual Variability ◽

Diet Change

Cost-Effectiveness of the Introduction of a Pre-Erythrocytic Malaria Vaccine into the Expanded Program on Immunization in Sub-Saharan Africa: Analysis of Uncertainties Using a Stochastic Individual-Based Simulation Model of Plasmodium falciparum Malaria

Value in Health ◽

10.1016/j.jval.2011.06.004 ◽

2011 ◽

Vol 14 (8) ◽

pp. 1028-1038 ◽

Cited By ~ 20

Author(s):

Nicolas Maire ◽

Samuel D. Shillcutt ◽

Damian G. Walker ◽

Fabrizio Tediosi ◽

Thomas A. Smith

Keyword(s):

Plasmodium Falciparum ◽

Cost Effectiveness ◽

Simulation Model ◽

Falciparum Malaria ◽

Malaria Vaccine ◽

Plasmodium Falciparum Malaria ◽

Sub Saharan Africa ◽

Sub Saharan ◽

Individual Based Simulation ◽

Expanded Program On Immunization

Golden Shiner Egg Production during a Spawning Season

North American Journal of Aquaculture ◽

10.1577/a09-064.1 ◽

2010 ◽

Vol 72 (3) ◽

pp. 272-277 ◽

Cited By ~ 7

Author(s):

Troy Clemment ◽

Nathan Stone

Keyword(s):

Egg Production ◽

Spawning Season ◽

Golden Shiner

New method of poultry selection

Genetika i razvedenie zhivotnyh ◽

10.31043/2410-2733-2021-1-61-66 ◽

2021 ◽

pp. 61-66

Author(s):

E. Rehleckaya ◽

A. Dymkov ◽

L. Lazarets ◽

A. Maltsev

Keyword(s):

Egg Production ◽

Initial Period ◽

Large Diameter ◽

Small Diameter ◽

Live Weight ◽

Individual Variability ◽

Egg Laying ◽

New Method ◽

Egg Diameter ◽

Correlation Rate

Purpose: Install the influence of the «small diameter of the egg» on the living mass and the reproductive qualities of chickens of meat crosses and the quail of meat breeds.Materials and methods. The selection was carried out along egg production and mass of eggs and additionally on the average small diameter of 5 eggs by value of ≥0.5σ from the average for the herd, while the evaluation on the basis of the «small diameter of the egg» was carried out in chickens aged 238 days of life, quails — 70 days of life. Calculated the average for each female and the average for the herd. For further reproduction, chickens carrying eggs with a small egg diameter ≥0.5σ from the average for the herd. Studies were held in SibNIP on quail and on the courses.Results. In the initial period of the egg laying, the individual variability of the small diameter of the egg — more than 10% (in the future, the figure decreased). The close correlation rate of the small egg diameter in the first half of the egg laying with such at the end of the bird's operation period was revealed. It has been established that the large diameter of the egg has a positive reliable connection with a lively mass, but negative with egg production. The reliable correlation rate of the small diameter of the egg with a live weight at a 42-day age, as well as with the derivation of eggs. The inheritance coefficients of the small diameter of the egg are comparable to the inheritance coefficients of the mass of eggs and significantly exceed those for a large diameter of the egg. The selection according to the small diameter of the eggs by ≥0.5σ from the average for the herd led to the fact that the chickens of the experimental groups reliably exceeded the live weight in the SB level of 1.57%, in the line G8 — by 1.35%. The superiority of a lively mass of quail of experienced groups was more pronounced than that of the chickens: the Pharaoh breed — by 4.15%, the Texas white breed is 4.22%. In relation to the derivation of eggs, a similar trend was traced. The derivation of eggs in quails of experienced groups was more than 4.59–4.98%; Country, respectively, 4.57–5.22%. Egg production of females of comparable groups of both chickens and quail was almost on the same level, and the difference was unreliable.Conclusion. It was established that a new method of breeding the poultry of the meat direction of productivity allows without decreasing egg production to increase the living mass of chickens of meat crosses by 1.5%, rewinds of meat breeds — by 4%, the derivation of eggs, respectively, by 4–5%. The method is intended for early prediction of females productivity during breeding selection.

REPRODUCTIVE ASPECTS OF SCALLOPED PERCHLET, Ambassis nalua (HAMILTON, 1822) IN PABEAN BAY INDRAMAYU, WEST JAVA

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.28930/jitkt.v9i1.17921 ◽

2017 ◽

Vol 9 (1) ◽

pp. 113

Author(s):

Nisha Desfi Arianti ◽

M.F. Rahardjo ◽

Ahmad Zahid

Keyword(s):

Sex Ratio ◽

Sampling Period ◽

Spawning Season ◽

West Java ◽

Fish Samples ◽

Length Range ◽

Males And Females ◽

Mature Fish ◽

First Maturity ◽

Somatic Index

ABSTRACTScalloped perchlet, Ambassis nalua, is one of fishes in Pabean Bay, Indramayu. This research aims to determine the reproductive aspects of Ambassis nalua in Pabean Bay Indramayu including sex ratio, spawning season, first maturity, fecundity and spawning pattern. Fish samples were collected by trap net and trammel net at three sites in Pabean Bay from April to October 2015. A total of 424 of A. nalua were caught, consist of 114 males and 310 females; with total length ranged from 38.04 to 112.63 mm and total weight ranged from 0.37 to 25.44 g. Sex ratio of mature fish was 1:1.9. The mature males and females were found in every month of sampling period. The gonado-somatic index (GSI) ranged from 0.40 to 0.83 and 2.36 to 4.54 for male and female, respectively. The peak of spawning season was found in September. The first maturity (Lm50) for male and female were 79.17 mm and 91.25 mm, respectively. The fecundity varied from 3,451–32,465 eggs. Egg diameter distribution shows that spawning pattern of A. nalua was batch spawner. Keywords: Ambassis nalua, spawning season, sex ratio, reproduction

Does annual variation in growth and sexual maturation of white sucker (Catostomus commersoni) confound comparisons between pulp mill contaminated and reference rivers?

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f98-014 ◽

1998 ◽

Vol 55 (5) ◽

pp. 1068-1077 ◽

Cited By ~ 3

Author(s):

Dany Bussières ◽

Marthe Monique Gagnon ◽

Julian Dodson ◽

Peter V Hodson

Keyword(s):

Sexual Maturation ◽

Pulp Mill ◽

Fish Populations ◽

White Sucker ◽

Catostomus Commersoni ◽

Gonad Size ◽

Kraft Mill Effluent ◽

Pulp Mill Effluents ◽

First Maturity ◽

Size At Age

A previous study on the effect of pulp and paper effluents on white sucker (Catostomus commersoni), conducted in 1991 and 1992, in both effluent-exposed and reference rivers showed that fish grew faster at downstream sites than at upstream sites. However, in contrast with fish from a reference river, fish exposed to effluent showed no decrease in age or size at first maturity or increase in gonad size or fecundity in response to greater growth. The objective of the present study, conducted in 1993, was to test if differences in measures of growth and sexual maturation between fish populations in exposed and reference rivers would vary from year to year and whether such variation would affect conclusions concerning the effects of pulp mill effluents. Although size at age, fecundity, and age at first maturity varied between the two studies, patterns of demographic responses to pulp mill effluents, relative to reference populations, remained the same, i.e., conclusions about effects of pulp mill effluents did not change despite variation in demographic variables between years and sites. This study reaffirmed the view that only by including the fish populations in a reference river could effects due to bleached kraft mill effluent be separated from effects due to nutrient gradients.

SPAWNING SEASON AND EGG PRODUCTION IN FORTH ESTUARY RETUSA OBTUSA (MONTAGU) (GASTROPODA: OPISTHOBRANCHIA)

Journal of Molluscan Studies ◽

10.1093/mollus/55.4.455 ◽

1989 ◽

Vol 55 (4) ◽

pp. 455-459 ◽

Cited By ~ 4

Author(s):

A. J. BERRY

Keyword(s):

Egg Production ◽

Spawning Season

Memory, not just perception, plays an important role in terrestrial mammalian migration

Proceedings of The Royal Society B Biological Sciences ◽

10.1098/rspb.2017.0449 ◽

2017 ◽

Vol 284 (1855) ◽

pp. 20170449 ◽

Cited By ~ 33

Author(s):

Chloe Bracis ◽

Thomas Mueller

Keyword(s):

Simulation Model ◽

Environmental Conditions ◽

Migration Routes ◽

Clear Signal ◽

Individual Based Simulation ◽

Underlying Mechanisms ◽

With Memory ◽

Key Questions

One of the key questions regarding the underlying mechanisms of mammalian land migrations is how animals select where to go. Most studies assume perception of resources as the navigational mechanism. The possible role of memory that would allow forecasting conditions at distant locations and times based on information about environmental conditions from previous years has been little studied. We study migrating zebra in Botswana using an individual-based simulation model, where perceptually guided individuals use currently sensed resources at different perceptual ranges, while memory-guided individuals use long-term averages of past resources to forecast future conditions. We compare simulated individuals guided by perception or memory on resource landscapes of remotely sensed vegetation data to trajectories of GPS-tagged zebras. Our results show that memory provides a clear signal that best directs migrants to their destination compared to perception at even the largest perceptual ranges. Zebras modelled with memory arrived two to four times, or up to 100 km, closer to the migration destination than those using perception. We suggest that memory in addition to perception is important for directing ungulate migration. Furthermore, our findings are important for the conservation of migratory mammals, as memory informing direction suggests migration routes could be relatively inflexible.

SPACE- AND COHORT-DEPENDENT LONGEVITY IN ADULT LIRIOMYZA TRIFOLII (BURGESS) (DIPTERA: AGROMYZIDAE) MASS-REARING CULTURES

The Canadian Entomologist ◽

10.4039/ent1281225-6 ◽

1996 ◽

Vol 128 (6) ◽

pp. 1225-1237 ◽

Cited By ~ 2

Author(s):

Kevin M. Heinz

Keyword(s):

Simulation Model ◽

Death Rate ◽

Adult Population ◽

Adult Emergence ◽

Mass Rearing ◽

Liriomyza Trifolii ◽

Biological Parameters ◽

Significant Difference ◽

Cage Size ◽

Population Sizes

AbstractVarious biological parameters of Liriomyza trifolii (Burgess) were investigated to maximize mass-rearing efficiency of this insect. Average percentage emergence from a cohort of uniformly aged pupae was 90.0% of which 37.0% were males. A significant difference in the among-day emergence sequences from a pupal cohort was detected with 77.5% of all females and 80.1% of all males emerging during the first 2 days of the emergence sequence. Adults emerging on day 3 within the emergence sequence lived significantly longer than did flies emerging on the other days within the sequence. Male flies lived an average of 9.9 days or 33.1% less than the 14.8-day average for female flies. Cage size was also found to influence adult longevity significantly with the greatest average longevity (20 days for females and 12 days for males) occurring in 385.6-cm3 cages. Emergence time within an emergence sequence and the physical size of an experimental unit are two previously experimentally undocumented sources of variation influencing longevity of Liriomyza. A significant nonlinear relationship between the number of flies leaving the rearing cages (as a result of normal rearing procedures) and the daily number of pupal L. trifolii added to each cage was detected. From these biological parameters, a birth and death rate simulation model was developed to predict adult population sizes of L. trifolii within a mass-rearing program. The gender-specific simulation model consisted of adult emergence (quantified in terms of the adult emergence sequence from a known number of pupae entered into each rearing culture), and adult death rate (quantified in terms of the survivorship of adults within the culture and the number of adults escaping from the culture). The adult population sizes predicted by the simulation model were not significantly different from the average population sizes observed from the rearing cages in validation studies utilizing normal mass-rearing practices. Use of this model should reduce the effort expended on maintaining host populations for commercial mass-production of natural enemies of L. trifolii.