Relations between allometry, male–male interactions and dispersal in a sap beetle, Librodor japonicus

Okada, K.; Nomura, Yuta; Miyatake, Takahisa

doi:10.1016/j.anbehav.2006.09.020

Cited by 27 publications

(28 citation statements)

References 30 publications

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“…data). Further investigation of the influence of size and age on dispersal patterns in the PIT tag data is warranted and ongoing, as size-dependent dispersal has been demonstrated in a variety of taxa, from fishes (Dorazio et al 1994, Imbert et al 2010) to arthropods (Etherington & Eggleston 2003, Okada et al 2007). In the meantime, the likely oc currence of ontogenetic redistribution indicated by conventional and PIT tag data does not preclude the establishment of spawning stock structure, indicated by PAT tag results, at scales relevant to fishery management.…”

Section: Spawning Group Spatial Structurementioning

confidence: 99%

Dispersal and behavior of Pacific halibut Hippoglossus stenolepis in the Bering Sea and Aleutian Islands region

Seitz¹,

Loher²,

Norcross³

et al. 2011

Aquat. Biol.

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Currently, it is assumed that eastern Pacific halibut Hippoglossus stenolepis belong to a single, fully mixed population extending from California through the Bering Sea, in which adult halibut disperse randomly throughout their range during their lifetime. However, we hypothesize that hali but dispersal is more complex than currently assumed and is not spatially random. To test this hypo thesis, we studied the seasonal dispersal and behavior of Pacific halibut in the Bering Sea and Aleutian Islands (BSAI). Pop-up Archival Transmitting tags attached to halibut (82 to 154 cm fork length) during the summer provided no evidence that individuals moved out of the Bering Sea and Aleutian Islands region into the Gulf of Alaska during the mid-winter spawning season, supporting the concept that this region contains a separate spawning group of adult halibut. There was evidence for geographically localized groups of halibut along the Aleutian Island chain, as all of the individuals tagged there displayed residency, with their movements possibly impeded by tidal currents in the passes between islands. Mid-winter aggregation areas of halibut are assumed to be spawning grounds, of which 2 were previously unidentified and extend the species' presumed spawning range ∼1000 km west and ∼600 km north of the nearest documented spawning area. If there are indeed independent spawning groups of Pacific halibut in the BSAI, their dynamics may vary sufficiently from those of the Gulf of Alaska, so that specifically accounting for their relative segregation and unique dynamics within the larger population model will be necessary for correctly predicting how these components may respond to fishing pressure and changing environmental conditions. Aquat Biol 12: [225][226][227][228][229][230][231][232][233][234][235][236][237][238][239] 2011 Aleutian Islands. It is assumed that adult halibut feed in shallow, nearshore areas during the summer, undertake a spawning migration to deeper water during winter, and return to their summer grounds during spring (Dunlop et al. 1964, Best 1981. In the Southeast Bering Sea (SEBS), spawning appears to be concentrated in relatively discrete winter spawning grounds near the edge of the continental shelf in the Bering Canyon and the Pribilof Canyon ( Fig. 1) (St-Pierre 1984). After spawning, egg and larval stages drift pelagically in the Bering Sea gyre for approximately 6 mo (Skud 1977, St. Pierre 1989 and then settle in nearshore areas (Thompson & Van Cleve 1936). After settling, it is thought that juvenile halibut conduct contranatant migrations to the area in which they were spawned to maintain population stationarity (Skud 1977, Hilborn et al. 1995.From the 1930s through the 1950s, at least 3 stocks of halibut were recognized, 1 in the Bering Sea and 2 in the Gulf of Alaska (GOA) (Fukuda 1962, Skud 1977. After this period, research indicated extensive intermingling of halibut among areas, and it was assumed that there was only a single stock of halibut. This research was based, in part, on...

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Section: Spawning Group Spatial Structurementioning

confidence: 99%

Dispersal and behavior of Pacific halibut Hippoglossus stenolepis in the Bering Sea and Aleutian Islands region

Seitz¹,

Loher²,

Norcross³

et al. 2011

Aquat. Biol.

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“…Many studies of male beetles have reported morphological trade-offs between weapons and sensory organs such as eyes and antennae (Nijhout & Emlen 1998;Emlen 2001), as well as between weapons and other traits related to mating success, including wings used in mate searching (Kawano 1995;Tomkins et al 2005;Okada et al 2007) and testes as a measure of male spermatogenic investment (Simmons & Emlen 2006). Such trade-offs indirectly suggest that dispersal and ejaculatory strategies can coevolve with the weapons used in armed male beetles (Emlen 2001;Simmons & Emlen 2006;Okada et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Such trade-offs indirectly suggest that dispersal and ejaculatory strategies can coevolve with the weapons used in armed male beetles (Emlen 2001;Simmons & Emlen 2006;Okada et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Dispersal and ejaculatory strategies associated with exaggeration of weapon in an armed beetle

et al. 2010

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Weapons used in male fighting can be costly to males and are often reported to trade off with other characters such as wings or spermatogenic investment. This study investigated whether increased investment into weapons can generate evolutionary changes in mating strategy for armed males. Male flour beetles, Gnatocerus cornutus, have enlarged mandibles that are used in male -male competition. We subjected these weapons to 12 generations of bidirectional selection and found trade-offs between weapons and two other male characters: wing and testis size. In addition, probably as a consequence of the observed changes in investment, dispersal ability and ejaculatory volume differ significantly between the lines. This indicates that the exaggeration of a weapon can be associated with dispersal and ejaculatory strategies. Thus, altered investment into weapons can lead to correlated changes in life-history traits.

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“…The trade-off relationship between the weapon and flight apparatus is often observed as a characteristic of weaponed insects, reflecting the diverse reproductive strategy of males (48)(49)(50). A distinct type of HDAC (e.g., HDAC1, HDAC3) that causes antagonistic responses to the mandible and wing may be associated with the trade-off relationship, but further investigations of the epigenetic status of the genes involved in mandible and wing development are required to confirm this possibility.…”

Section: Discussionmentioning

confidence: 99%

Histone deacetylases control module-specific phenotypic plasticity in beetle weapons

Ozawa

Mizuhara

Arata

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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Nutritional conditions during early development influence the plastic expression of adult phenotypes. Among several body modules of animals, the development of sexually selected exaggerated traits exhibits striking nutrition sensitivity, resulting in positive allometry and hypervariability distinct from other traits. Using de novo RNA sequencing and comprehensive RNA interference (RNAi) for epigenetic modifying factors, we found that histone deacetylases (HDACs) and polycomb group (PcG) proteins preferentially influence the size of mandibles (exaggerated male weapon) and demonstrate nutrition-dependent hypervariability in the broad-horned flour beetle, Gnatocerus cornutus. RNAi-mediated HDAC1 knockdown (KD) in G. cornutus larvae caused specific curtailment of mandibles in adults, whereas HDAC3 KD led to hypertrophy. Notably, these KDs conferred opposite effects on wing size, but little effect on the size of the core body and genital modules. PcG RNAi also reduced adult mandible size. These results suggest that the plastic development of exaggerated traits is controlled in a module-specific manner by HDACs.phenotypic plasticity | HDAC | Gnatocerus cornutus | exaggerated male weapon | sexual dimorphism

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Relations between allometry, male–male interactions and dispersal in a sap beetle, Librodor japonicus

Cited by 27 publications

References 30 publications

Dispersal and behavior of Pacific halibut Hippoglossus stenolepis in the Bering Sea and Aleutian Islands region

Dispersal and behavior of Pacific halibut Hippoglossus stenolepis in the Bering Sea and Aleutian Islands region

Dispersal and ejaculatory strategies associated with exaggeration of weapon in an armed beetle

Histone deacetylases control module-specific phenotypic plasticity in beetle weapons

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