3 edition of Sperm competition and alternative mating tactics in bluegill sunfish found in the catalog.
Sperm competition and alternative mating tactics in bluegill sunfish
Thesis (M.Sc.) -- University of Toronto, 2000.
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Ecology. This thesis examines sperm cornpetition in the context of Sperm competition and alternative mating tactics in bluegill sunfish book alternative male mating tactics in bluegill sunfish (Lepomis macrochinïs), and contains two chapters.
Chapter one examines the fertilization success of alternative mating tactics under sperm competition, and tests the hypothesis that sneaks win under sperm competition, as predicted by the Sneak-Guard : Peng Fu.
Although alternative mating tactics are found in males of many species, little is known about tactic-specific adaptations to sperm competition and the mechanism by which fertilization success is obtained.
We now report on the sperm investment patterns of males that use alternative mating tactics in bluegill sunfish (Lepomis macrochirus). Bluegill males are characterized by three alternative mating tactics: parentals, sneakers Cited by: Although alternative mating tactics are found in males of many species, little is known about tactic-specific adaptations to sperm competition and the mechanism by which fertilization success is.
Steroid hormones in bluegill, a species with male alternative reproductive Steroid hormones in bluegill, a species with male alternative reproductive tactics including female mimicry Effects of foraging and sexual selection on ecomorphology of a fish with Cited by: Sperm competition, alternative mating tactics and context-dependent fertilization success in Sperm competition and alternative mating tactics in bluegill sunfish book burying beetle, Nicrophorus vespilloides.
Sperm competition and alternative mating tactics in bluegill sunfish book M House. Clarissa M House. Sperm investment and alternative mating tactics in bluegill sunfish (Lepomis macrochirus).
by: Although alternative mating tactics are found in males of many species, little is known about tactic-specific adaptations to sperm competition and the mechanism by which fertilization success is obtained.
We now report on the sperm investment patterns of males that use alternative mating tactics in bluegill sunfish (Lepomis macrochirus). Keywords: sperm competition; alternative mating tactics; sneak-guard Sperm competition and alternative mating tactics in bluegill sunfish book paternity; bluegill 1.
INTRODUCTION Sperm competition is widespread in nature (Birkhead & Moller ). Parker () defined sperm competition as the 'competition between the sperm from two or more males for the fertilization of a given set of ova' (p.
The. Fertilization success in sperm competition is often determined by laboratory estimates of the proportion of offspring sired by the first (P1) or second (P2) male that mates. However, inferences fro Cited by: Considerable research in sperm competition has supported the sperm allocation models of Parker (a,b) that considered the tactics adopted by males when they find themselves competing in either a favoured or disfavoured by: Many fishes are characterized by intense sperm competition between males that use alternative mating tactics.
In externally fertilizing fishes, males’ proximity to females during spawning can be an important determinant of fertilization by: The purpose of the present study was to examine mechanisms used during sperm competition by males that utilize different mating tactics in bluegill.
Specifically, we incorporated information on proximity of males to females and timing of sperm release to assess the contribution of sperm number, length and speed to fertilization by: Although alternative mating tactics are found in males of many species, little is known about tactic-speciﬁc adaptations to sperm competition and the mechanism by which fertilization success is obtained.
We now report on the sperm investment patterns of males that use alternative mating tactics in bluegill sunﬁsh (Lepomis macrochirus).Cited by: of fertilization success.
Here, we assess how mating tactic, body length, speed during streak spawns, and periphery cover affect males’ proximity to females during sperm competition in the externally fertilizing bluegill (Lepomis macrochirus). Bluegill are characterized by three mating tactics referred to as parental, sneaker, and satellite.
Paren-tals are territorial and construct nests, while sneakers use a. Female mating status. When detectable, female mated status (Table 2) predicts the risk of sperm competition that a male's ejaculate will subsequently face. In species in which females store sperm (i.e.
most insects), males might be able to assess risk via sperm Cited by: Keywords Sperm competition Sperm Fish Alternative reproductive strategies Introduction Sexually mature male bluegills (Lepomis macrochirus) employ one of three different mating tactics, represent-ing two distinct life histories.
Parental males delay repro-duction until age 7 years when they are approximately 17 cm long (Gross ). Alternative mating strategy. An alternative mating strategy is a strategy used by male or female animals, often with distinct phenotypes, that differs from the prevailing mating strategy of their sex.
Such strategies are diverse and variable both across and within species. Males pursuing alternative reproductive tactics have been predicted to face a trade-off between maximizing either swimming performance or endurance of their sperm. However, empirical evidence for this trade-off is equivocal, which may be due to simplistic assumptions.
In the shell-brooding cichlid fish Lamprologus callipterus, two Mendelian male morphs compete for fertilization by divergent Cited by: 4.
A fundamental assumption of sperm competition theory is that ejaculates with high motility and fast-swimming sperm have an advantage with respect to fertilization success.
We tested this assumption by studying the fertilization dynamics of alternative mating tactics (cuckolders and parentals) of male bluegill (Lepomis macrochirusCited by: In a variety of taxa, males deploy alternative reproductive tactics to secure fertilizations.
In many species, small “sneaker” males attempt to steal fertilizations while avoiding encounters with larger, more aggressive, dominant by: Sperm competition is a form of male–male competition that warrants its own section in a textbook because it is indeed so basic and important.
78 Many 79 marine animals release their gametes into the ocean (this is called spawning), but this does not mean there is an absence of competition in mating, nor does it mean that the resulting zygotes are the results of random meetings of eggs and sperm. As with.
Full Text; PDF ( K) PDF-Plus ( K) Citing articles; Morphological and swim performance variation among reproductive tactics of bluegill sunfish (Lepomis macrochirus)S.F. Colborne, a M.C. Bellemare, b P.R.
Peres-Neto, b B.D. Neff a a Department of Biology, University of Western Ontario, London, ON N6A 5B7, Canada. b Department of Biological Sciences, Université du Québec à Montréal. Alternative reproductive tactics (ARTs) are found in several Lake Tanganyika shell-brooding cichlids.
Field studies were conducted in the Wonzye population to examine reproductive ecology and ARTs in the Lake Tanganyika shell-brooding cichlid Neolamprologus brevis.
We discovered that this fish occurred in both rocky- and sandy-bottom habitats, but in rocky habitats, brood-caring females Cited by: 4. Similarly, in many fish species in which males exhibit alternative mating tactics (e.g. sneaks, parentals and satellites), negative associations have been reported between the expression of male ornaments and sperm traits, including ejaculate size (e.g.
black goby Rasotto & Mazzoldi, ) and quality (e.g. salmon: Vladic & Jarvi, Cited by: In contrast to taxa in which alternative mating tactics are either fixed or vary ontogenetically 1,9,10, cuttlefish use neural control to change their skin patterning, posture and tactics Cited by: Bluegill sunfish (Lepomis macrochirus) are one of the classic systems for studying male alternative reproductive tactics (ARTs) in teleost fishes.
In this species, there are two distinct life histories: parental and cuckolder, encompassing three reproductive tactics, parental, satellite, and sneaker. The parental life history is fixed, whereas individuals who enter the cuckolder life history Cited by: 1.
Male and female courtship tactics: MATING FLIGHT (basic) -Male inseminates female, leaving behind guts and parts of penis to ensure sperm will be in her 2.
Mating system: POLYANDRY -Queen bee mating w/ >1 male 3. Parental care: SOCIAL CARE -Worker bees' first job upon hatching is to take care of brood-All related females together care for young.
These different responses to the reproductive competition are called alternative mating tactics (Taborsky et al., ; Buzatto et al., a), which are particularly well studied in horned dung beetles (Scarabaeidae) with intrasexual dimorphism (Simmons & Ridsdill‐Smith, ).Cited by: 1.
The nest holding period (NHP), that is, the time a nest male monopolizes and defends a nest, can differ extremely among males (Sato ), which is strongly influenced by male body condition (Schütz et al.
).During this period, nest males are regularly challenged by the interference of males pursuing one of two alternative mating tactics, which attempt to parasitize the high reproductive Cited by: 5. between alternative male reproductive strategies.
The bluegill sunfish (Lepomis macrochirus) has two male reproductive strategies, cuckolder or parental, used by different males to compete in fertilizing the same eggs. As the density of cuckolders in colonies of parental males increases, the average mating. Abstract. Males of many species are characterized by alternative mating tactics.
In bluegill sunfish (Lepomis macrochirus), some males delay maturation and become “parentals” while other males mature precociously and become “cuckolders.”Parentals use an overt, territorial mating tactic, defending a nest and courting by: Sperm investment and alternative mating tactics in bluegill sunfish (Lepomis macrochirus) BD Neff, P Fu, MR Gross parasite load and paternity in bluegill sunfish, Lepomis macrochirus.
B Neff, L Cargnelli. Environmental Biology of Fishes 71 (3), Tactic–specific success in sperm competition. Neff BD, Fu P, Gross MR. Sperm investment and alternative mating tactics in bluegill sunfish (Lepomis macrochirus).
Behav Ecol ; – de Fraipont M, Fitzgerald GJ, Guderley H. Age-related differences in reproductive tactics in the three-spined stickleback, Gasterosteus aculea-tus. Anim Behav ; – In species in which alternative male mating tactics have evolved that generate different risks of sperm competition, males playing tactics that are associated with higher risks generally invest relatively more in ejaculates than do males that experience lower risks, as predicted by theory.
Furthermore, males have evolved fixed strategies of Cited by: Third, when both tactics face a high level of sperm competition (as in the case of the two gobies studied here and probably of most fishes with alternative mating tactics), selection for high sperm quality should be similar in both type of males, or even stronger in sneaker by: Polyandry and alternative mating tactics Bryan D.
Neff1 and Erik I. Svensson2 1Department of Biology, Western University, Richmond Street, London, Ontario, Canada N6P 0A7 2Department of Biology, Lund University, BoxLund, 00, Sweden Many species in the animal kingdom are characterized by alternative mating tactics (AMTs) within a by: Alternative reproductive tactics (ARTs) are found in several Lake Tanganyika shell-brooding cichlids.
Field studies were conducted in the Wonzye population to examine reproductive ecology and ARTs in the Lake Tanganyika shell-brooding cichlid Neolamprologus discovered that this fish occurred in both rocky- and sandy-bottom habitats, but in rocky habitats, brood-caring.
Lecture 35 - Alternative Breeding Strategies Overview. Breeding strategies differ both among males and females of the same species as well as among different species. The difference in breeding strategies among members of the same species can usually be linked to frequency dependence. If the species is at evolutionary equilibrium, the relative.
Start studying Biology Lecture Learn vocabulary, terms, and more with flashcards, games, and other study tools. Tags: alternative strategies bluegill sunfish evolution Guards mating reproduction sneakers sperm competition IN THESE TRYING TIMES Accurate scientific information is more important than : Sarah Nason.
Alternative reproductive tactics are widespread in fishes, increasing the potential for sperm competition. Sperm competition has enormous impact on both variation in sperm numbers and sperm size. In cichlids, the sperm competition risk is very divergent and longer sperm are usually interpreted as adaptation to sperm competition.
Here we examined whether sneaking tactics exist in Cited by: 9. Alternative reproductive pdf (ARTs) are prevalent in nature, where smaller parasitic pdf typically have better sperm quality than larger territorial guard males. At present, it is unclear what is causing this phenomenon. Our objective was to gain insights into sperm form and function by examining flagellar beating patterns (beat frequency, wave amplitude, bend length, bend angle, wave Cited by: Differences in Sperm Characteristics and Fertilization Success Across Populations of the American Horseshoe Crab, Limulus polyphemus The game model theory of sperm competition predicts that males who experience high levels of sperm competition should invest more resources in sperm development and of the American Horseshoe Crab, Limulus polyphemus The4/5.The ebook is most closely related to the orangespotted sunfish and the redear sunfish, but ebook in a distinct spot at or near the base of the soft dorsal fin.
Distribution and habitat. The bluegill occurs naturally in the United States east of the Rocky Mountains from coastal Virginia to Florida, west to Texas and northern Mexico, and Class: Actinopterygii.