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Differences in life-history and ecological traits between co-occurring Panulirus spiny lobsters (Decapoda, Palinuridae).

Briones-Fourzán P - Zookeys (2014)

Bottom Line: Coexistence of closely related species may be promoted by niche differentiation or result from interspecific trade-offs in life history and ecological traits that influence relative fitness differences and contribute to competitive inequalities.Whether the substantial niche differentiation and apparent interspecific trade-offs between Panulirusargus and Panulirusguttatus relative to Panulirusgracilis and Panulirusinflatus reflect an earlier divergence of the former pair of species in the evolution of the genus constitutes an intriguing hypothesis.However, whether or not post-divergence evolution of each species pair occurred in sympatry remains uncertain.

View Article: PubMed Central - HTML - PubMed

Affiliation: Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica de Sistemas Arrecifales. Prol. Av. Niños Héroes s/n, Puerto Morelos, Quintana Roo, México.

ABSTRACT
Coexistence of closely related species may be promoted by niche differentiation or result from interspecific trade-offs in life history and ecological traits that influence relative fitness differences and contribute to competitive inequalities. Although insufficient to prove coexistence, trait comparisons provide a first step to identify functional differences between co-occurring congeneric species in relation to mechanisms of coexistence. Here, a comparative review on life history and ecological traits is presented for two pairs of co-occurring species of spiny lobsters in the genus Panulirus: Panulirusgracilis and Panulirusinflatus from the Eastern Central Pacific region, and Panulirusargus and Panulirusguttatus from the Caribbean region. Panulirusgracilis and Panulirusinflatus have similar larval, postlarval, and adult sizes and a similar diet, but differ in degree of habitat specialization, fecundity, and growth rate. However, little is known on behavioral traits of these two species that may influence their competitive abilities and susceptibility to predators. The more abundant information on Panulirusargus and Panulirusguttatus shows that these two species differ more broadly in degree of habitat specialization, larval, postlarval and adult sizes, diet, fecundity, growth rate, degree of sociality, defense mechanisms, susceptibility to predators, and chemical ecology, suggesting a greater degree of niche differentiation between Panulirusargus and Panulirusguttatus than between Panulirusgracilis and Panulirusinflatus. Whether the substantial niche differentiation and apparent interspecific trade-offs between Panulirusargus and Panulirusguttatus relative to Panulirusgracilis and Panulirusinflatus reflect an earlier divergence of the former pair of species in the evolution of the genus constitutes an intriguing hypothesis. However, whether or not post-divergence evolution of each species pair occurred in sympatry remains uncertain.

No MeSH data available.


Potential ecological interactions between Panulirusgracilis and Panulirusinflatus in a rocky site (“Site A”) in Zihuatanejo, Mexico. A lobster density (number of individuals ha–1) B relative abundance of molluscs (percentage of molluscs in benthic samples) C condition factor of lobsters. Error bars denote 95% CI. (Data from ALozano et al. 1982, BAramoni-Serrano 1982, CLozano-Álvarez and Aramoni-Serrano 1996).
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Figure 4: Potential ecological interactions between Panulirusgracilis and Panulirusinflatus in a rocky site (“Site A”) in Zihuatanejo, Mexico. A lobster density (number of individuals ha–1) B relative abundance of molluscs (percentage of molluscs in benthic samples) C condition factor of lobsters. Error bars denote 95% CI. (Data from ALozano et al. 1982, BAramoni-Serrano 1982, CLozano-Álvarez and Aramoni-Serrano 1996).

Mentions: Stomach content analyses showed that Panulirusgracilis and Panulirusinflatus consume various types of invertebrate prey but that both species exhibit a marked preference for molluscs (Lozano-Álvarez and Aramoni-Serrano 1996) (Fig. 3). In Zihuatanejo, a capture-recapture experiment was conducted during 1979–80 to estimate monthly lobster densities on a 36-ha rocky site (“site A”) where the two species co-occurred (Lozano et al. 1982). At the same time, the seasonal composition of the benthic community at site A and other sites, as well as the seasonal changes in condition factor of the two lobster species were studied (Aramoni-Serrano 1982, Lozano-Álvarez and Aramoni-Serrano 1996). The total density of lobsters on site A showed a marked increase in September-October relative to the other months (Fig. 4A). For each separate species, the density showed values ≤ 15 ind. ha–1 between April and August, but then more than doubled in September. In October, the density of Panulirusinflatus doubled again while that of Panulirusgracilis decreased to previous levels. By November, the density of Panulirusinflatus also decreased to previous levels (Fig. 4A).


Differences in life-history and ecological traits between co-occurring Panulirus spiny lobsters (Decapoda, Palinuridae).

Briones-Fourzán P - Zookeys (2014)

Potential ecological interactions between Panulirusgracilis and Panulirusinflatus in a rocky site (“Site A”) in Zihuatanejo, Mexico. A lobster density (number of individuals ha–1) B relative abundance of molluscs (percentage of molluscs in benthic samples) C condition factor of lobsters. Error bars denote 95% CI. (Data from ALozano et al. 1982, BAramoni-Serrano 1982, CLozano-Álvarez and Aramoni-Serrano 1996).
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4283377&req=5

Figure 4: Potential ecological interactions between Panulirusgracilis and Panulirusinflatus in a rocky site (“Site A”) in Zihuatanejo, Mexico. A lobster density (number of individuals ha–1) B relative abundance of molluscs (percentage of molluscs in benthic samples) C condition factor of lobsters. Error bars denote 95% CI. (Data from ALozano et al. 1982, BAramoni-Serrano 1982, CLozano-Álvarez and Aramoni-Serrano 1996).
Mentions: Stomach content analyses showed that Panulirusgracilis and Panulirusinflatus consume various types of invertebrate prey but that both species exhibit a marked preference for molluscs (Lozano-Álvarez and Aramoni-Serrano 1996) (Fig. 3). In Zihuatanejo, a capture-recapture experiment was conducted during 1979–80 to estimate monthly lobster densities on a 36-ha rocky site (“site A”) where the two species co-occurred (Lozano et al. 1982). At the same time, the seasonal composition of the benthic community at site A and other sites, as well as the seasonal changes in condition factor of the two lobster species were studied (Aramoni-Serrano 1982, Lozano-Álvarez and Aramoni-Serrano 1996). The total density of lobsters on site A showed a marked increase in September-October relative to the other months (Fig. 4A). For each separate species, the density showed values ≤ 15 ind. ha–1 between April and August, but then more than doubled in September. In October, the density of Panulirusinflatus doubled again while that of Panulirusgracilis decreased to previous levels. By November, the density of Panulirusinflatus also decreased to previous levels (Fig. 4A).

Bottom Line: Coexistence of closely related species may be promoted by niche differentiation or result from interspecific trade-offs in life history and ecological traits that influence relative fitness differences and contribute to competitive inequalities.Whether the substantial niche differentiation and apparent interspecific trade-offs between Panulirusargus and Panulirusguttatus relative to Panulirusgracilis and Panulirusinflatus reflect an earlier divergence of the former pair of species in the evolution of the genus constitutes an intriguing hypothesis.However, whether or not post-divergence evolution of each species pair occurred in sympatry remains uncertain.

View Article: PubMed Central - HTML - PubMed

Affiliation: Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica de Sistemas Arrecifales. Prol. Av. Niños Héroes s/n, Puerto Morelos, Quintana Roo, México.

ABSTRACT
Coexistence of closely related species may be promoted by niche differentiation or result from interspecific trade-offs in life history and ecological traits that influence relative fitness differences and contribute to competitive inequalities. Although insufficient to prove coexistence, trait comparisons provide a first step to identify functional differences between co-occurring congeneric species in relation to mechanisms of coexistence. Here, a comparative review on life history and ecological traits is presented for two pairs of co-occurring species of spiny lobsters in the genus Panulirus: Panulirusgracilis and Panulirusinflatus from the Eastern Central Pacific region, and Panulirusargus and Panulirusguttatus from the Caribbean region. Panulirusgracilis and Panulirusinflatus have similar larval, postlarval, and adult sizes and a similar diet, but differ in degree of habitat specialization, fecundity, and growth rate. However, little is known on behavioral traits of these two species that may influence their competitive abilities and susceptibility to predators. The more abundant information on Panulirusargus and Panulirusguttatus shows that these two species differ more broadly in degree of habitat specialization, larval, postlarval and adult sizes, diet, fecundity, growth rate, degree of sociality, defense mechanisms, susceptibility to predators, and chemical ecology, suggesting a greater degree of niche differentiation between Panulirusargus and Panulirusguttatus than between Panulirusgracilis and Panulirusinflatus. Whether the substantial niche differentiation and apparent interspecific trade-offs between Panulirusargus and Panulirusguttatus relative to Panulirusgracilis and Panulirusinflatus reflect an earlier divergence of the former pair of species in the evolution of the genus constitutes an intriguing hypothesis. However, whether or not post-divergence evolution of each species pair occurred in sympatry remains uncertain.

No MeSH data available.