Seasonal changes in size, sex-ratio and body condition of the damselfish<i>Chromis chromis</i>in the central Mediterranean Sea

Bracciali, Claudia; Piovano, Susanna; Sarà, Gianluca; Giacoma, Cristina

doi:10.1017/s0025315414000459

Cited by 6 publications

(8 citation statements)

References 54 publications

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“…An unequal sex ratio was observed for C. notata , probably attributable to the reproductive behavior of pomacentrid fish. Males migrate to the bottom and are involved in parental care during the spawning period (Ochi, ; Bracciali, Piovano, Sara, & Giacoma, ). The spawning period for C. notata was from June to August, as reported in Go and Jeon (); Suzuki, Hioki, and Kurita (); and Lee and Lee ().…”

Section: Discussionmentioning

confidence: 99%

Age and growth of damselfish Chromis notata (Temminck & Schlegel, 1843), Jeju Island, Korea

Kim

2016

J. Appl. Ichthyol.

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Summary This study investigated the age and growth of damselfish, Chromis notate, from Jeju Island in Korea. Samples were collected monthly by lift net from September 2013 to August 2014. Total lengths of the damselfish ranged from 6.4 to 15.3 cm. The relationship between total length and wet weight was WW = 0.0125TL3.1631 for females, and WW = 0.0091TL3.2769 for males. The slopes in the relationship between length and weight were not significantly different between sexes, but were significantly different in the intercepts. There were more female than male specimens (1.3:1). Age determination was conducted using the otoliths. Marginal increment (MI) declined in summer and winter, which suggests that two rings are formed each year. Ages of sampled individuals ranged from 1 to 5 years. Length‐at‐age data were fitted using the von Bertalanffy growth model. The estimated growth functions were Lt = 19.93 [1 − exp−0.21 (t + 0.811)] total length and wet weight was females, and Lt = 16.47 [1 − exp−0.32 (t + 0.499)] for males.

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Section: Discussionmentioning

confidence: 99%

Age and growth of damselfish Chromis notata (Temminck & Schlegel, 1843), Jeju Island, Korea

Kim

2016

J. Appl. Ichthyol.

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“…Age, growth and mortality of C. chromis were described by Dulčić & Kraljević () and individual size, sex‐ratio and body condition were all explored by Bracciali et al . ().…”

Section: Introductionmentioning

confidence: 97%

“…Dulčić & Kraljević (1994) showed that C. chromis fecundity (the number of mature eggs) increased exponentially with fish age-length and that females become sexually mature at 6·8-7·3 cm L T as they approached age 2 years. Age, growth and mortality of C. chromis were described by Dulčić & Kraljević (1995) and individual size, sex-ratio and body condition were all explored by Bracciali et al (2014). Chromis chromis has a long history of scientific investigation (Cooper & Santini, 2006), it is one of only two damselfish species (family Pomacentridae) included in Linnaeus's Systema Naturae (1758), though referred to at the time as Sparus chromis.…”

Section: Introductionmentioning

confidence: 99%

Why the damselfishChromis chromisis a key species in theMediterranean rocky littoral – a quantitative perspective

Pinnegar

2018

Journal of Fish Biology

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The damselfish Chromis chromis is typically the most abundant fish species in the rocky littoral environment of the Mediterranean Sea, where it feeds in huge shoals on incoming zooplankton and rests near the seabed each night. Research has shown that large populations of C. chromis play a fundamental role by transferring carbon, nitrogen and phosphorus directly from the pelagic system to the littoral in the form of solid and liquid wastes and therefore that this species acts as a vital conduit for nutrients. In addition, C. chromis represents a major prey item for predatory fish and seabirds, it has been shown to exert significant predation pressure on coastal zooplankton populations, but it is also a major consumer of fish eggs and hence may have a strong influence on the dynamics of other fish species. In this review paper the contention is that C. chromis represents a key species in the Mediterranean Sea rocky littoral. This view is supported by quantitative evidence that has been amassed over a number of years, but is collated here for the first time. Chromis chromis is of only minor importance to commercial fisheries (it is usually discarded), but trends in population abundance of this species can be indicative of levels of fishing pressure on other commercial species. It has been demonstrated that where predator numbers are able to recover from intensive fishing (e.g.in marine protected areas; MPAs), this is often mirrored by lower densities of C. chromis. Several papers have championed C. chromis as a possible indicator species for human disturbance. As well as being directly and indirectly affected by fishing, the species is also sensitive to a number of other anthropogenic pressures, most notably poor water quality and noise pollution.

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“…The Mediterranean damselfish Chromis chromis (L. 1758) is characterized by male nest defence. This is a small (average standard length, L S = 6 cm; Bracciali et al ., ), sexually monomorphic species commonly distributed in the Mediterranean Sea, extending to the eastern part of the Atlantic Ocean. It lives in shoals near rocky reefs or above seagrass meadows at depths between 3 and 30 m (Lythgoe & Lythgoe, ; Quignard & Pras, ).…”

Section: Introductionmentioning

confidence: 99%

TheARTof mating: alternative reproductive tactics and mating success in a nest‐guarding fish

Mascolino

Benvenuto

Gubili

et al. 2016

Journal of Fish Biology

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Behavioural observations in the field of male Mediterranean damselfish Chromis chromis were combined with molecular analyses, using bi-parentally and maternally inherited markers, to investigate reproductive success patterns of alternative reproductive tactics (ARTs) in terms of number of eggs sired and number of females contributing to each nest. Cuckoldry was observed in every nest sampled, with at least two and up to seven sneaker males per nest. The nesting male, however, always significantly fertilized the greater number of eggs (on average 49%) in each clutch, whereas each sneaker fertilized around 7% of the clutch. The average number of females whose eggs were fertilized by nesting males was 6·76 (range 2-13), while each sneaker on average fertilized the eggs of 1·74 (range 1-8) females. Using this sibship reconstruction, some of the factors involved in the regulation of the dynamic equilibrium of reproductive success were investigated between the two ARTs shown by C. chromis males. Results show that the sneakers' reproductive success was positively linked to egg clutch size; the density of individuals in the nesting area negatively affected the size of egg clutches; the rate of defence behaviours performed by nesting males negatively influenced the number of females contributing to each nest.

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Seasonal changes in size, sex-ratio and body condition of the damselfishChromis chromisin the central Mediterranean Sea

Cited by 6 publications

References 54 publications

Age and growth of damselfish Chromis notata (Temminck & Schlegel, 1843), Jeju Island, Korea

Age and growth of damselfish Chromis notata (Temminck & Schlegel, 1843), Jeju Island, Korea

Why the damselfishChromis chromisis a key species in theMediterranean rocky littoral – a quantitative perspective

TheARTof mating: alternative reproductive tactics and mating success in a nest‐guarding fish

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