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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.


Differences in some life-history traits between Panulirusargus and Panulirusguttatus from Puerto Morelos, Mexico. A carapace length (CL) distribution (n Panulirusargus: 717, n Panulirusguttatus: 450) B mean size C growth rate of males (mm CL week–1, n Panulirusargus: 148, n Panulirusguttatus: 57) D brood size (number of eggs per clutch) versus CL relationship. Error bars denote 95% confidence intervals. (Data from A, BLozano-Álvarez et al. 2007, Briones-Fourzán and Lozano-Álvarez 2013, CNegrete-Soto et al. 2002, DFonseca-Larios and Briones-Fourzán 1998, Briones-Fourzán and Contreras-Ortiz 1999).
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Figure 5: Differences in some life-history traits between Panulirusargus and Panulirusguttatus from Puerto Morelos, Mexico. A carapace length (CL) distribution (n Panulirusargus: 717, n Panulirusguttatus: 450) B mean size C growth rate of males (mm CL week–1, n Panulirusargus: 148, n Panulirusguttatus: 57) D brood size (number of eggs per clutch) versus CL relationship. Error bars denote 95% confidence intervals. (Data from A, BLozano-Álvarez et al. 2007, Briones-Fourzán and Lozano-Álvarez 2013, CNegrete-Soto et al. 2002, DFonseca-Larios and Briones-Fourzán 1998, Briones-Fourzán and Contreras-Ortiz 1999).

Mentions: Adults of Panulirusargus and Panulirusguttatus have a very different body size (Fig. 5A). For example, in the Puerto Morelos coral reef, Panulirusargus has a much larger mean size (82.3 ± 2.24 mm CL) than Panulirusguttatus (59.0 ± 0.83 mm CL) (Fig. 5B) and the former species also grows much faster than the latter (weekly growth rate for males, Panulirusargus: 0.91 ± 0.6 mm CL week–1, Panulirusguttatus: 0.26 ± 0.13 mm CL week–1) (Lozano-Álvarez et al. 1991, Negrete-Soto et al. 2002) (Fig. 5C). In the same location, the largest ovigerous female of Panulirusguttatus ever recorded (73.5 mm CL) was smaller than the smallest ovigerous female of Panulirusargus ever recorded (75.0 mm CL). In both species, large females can produce up to four broods per year (Cruz and de León 1991, Briones-Fourzán and Contreras-Ortiz 1999), but the CL50 of ovigerous females is 95.5 mm CL for Panulirusargus and 59.0 mm CL for Panulirusguttatus (Briones-Fourzán 1995). Due to the large interspecific difference in size, size-specific fecundity is far larger in Panulirusargus than in Panulirusguttatus (Fonseca-Larios and Briones-Fourzán 1998, Briones-Fourzán and Contreras-Ortiz 1999) (Fig. 5D), more so when the size of the eggs is taken into account. As Pollock (1997) had previously noted, the number of eggs per gram of body weight is significantly larger (indicating smaller eggs) in Panulirusargus (689 ± 27) than in Panulirusguttatus (519 ± 15) (t322 = 10.925, p < 0.0001).


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

Briones-Fourzán P - Zookeys (2014)

Differences in some life-history traits between Panulirusargus and Panulirusguttatus from Puerto Morelos, Mexico. A carapace length (CL) distribution (n Panulirusargus: 717, n Panulirusguttatus: 450) B mean size C growth rate of males (mm CL week–1, n Panulirusargus: 148, n Panulirusguttatus: 57) D brood size (number of eggs per clutch) versus CL relationship. Error bars denote 95% confidence intervals. (Data from A, BLozano-Álvarez et al. 2007, Briones-Fourzán and Lozano-Álvarez 2013, CNegrete-Soto et al. 2002, DFonseca-Larios and Briones-Fourzán 1998, Briones-Fourzán and Contreras-Ortiz 1999).
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

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

Figure 5: Differences in some life-history traits between Panulirusargus and Panulirusguttatus from Puerto Morelos, Mexico. A carapace length (CL) distribution (n Panulirusargus: 717, n Panulirusguttatus: 450) B mean size C growth rate of males (mm CL week–1, n Panulirusargus: 148, n Panulirusguttatus: 57) D brood size (number of eggs per clutch) versus CL relationship. Error bars denote 95% confidence intervals. (Data from A, BLozano-Álvarez et al. 2007, Briones-Fourzán and Lozano-Álvarez 2013, CNegrete-Soto et al. 2002, DFonseca-Larios and Briones-Fourzán 1998, Briones-Fourzán and Contreras-Ortiz 1999).
Mentions: Adults of Panulirusargus and Panulirusguttatus have a very different body size (Fig. 5A). For example, in the Puerto Morelos coral reef, Panulirusargus has a much larger mean size (82.3 ± 2.24 mm CL) than Panulirusguttatus (59.0 ± 0.83 mm CL) (Fig. 5B) and the former species also grows much faster than the latter (weekly growth rate for males, Panulirusargus: 0.91 ± 0.6 mm CL week–1, Panulirusguttatus: 0.26 ± 0.13 mm CL week–1) (Lozano-Álvarez et al. 1991, Negrete-Soto et al. 2002) (Fig. 5C). In the same location, the largest ovigerous female of Panulirusguttatus ever recorded (73.5 mm CL) was smaller than the smallest ovigerous female of Panulirusargus ever recorded (75.0 mm CL). In both species, large females can produce up to four broods per year (Cruz and de León 1991, Briones-Fourzán and Contreras-Ortiz 1999), but the CL50 of ovigerous females is 95.5 mm CL for Panulirusargus and 59.0 mm CL for Panulirusguttatus (Briones-Fourzán 1995). Due to the large interspecific difference in size, size-specific fecundity is far larger in Panulirusargus than in Panulirusguttatus (Fonseca-Larios and Briones-Fourzán 1998, Briones-Fourzán and Contreras-Ortiz 1999) (Fig. 5D), more so when the size of the eggs is taken into account. As Pollock (1997) had previously noted, the number of eggs per gram of body weight is significantly larger (indicating smaller eggs) in Panulirusargus (689 ± 27) than in Panulirusguttatus (519 ± 15) (t322 = 10.925, p < 0.0001).

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.