Preliminary estimates of the age and growth of immature smooth oreo Pseudocyttus maculatus Gilchrist 1906 (Oreosomatidae) in the Falkland Islands region of the South Atlantic

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https://doi.org/10.1007/s003000050254
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Microstructure, Life History, Growth Phase, Ageing Study, Preliminary Estimate

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Preliminary estimates of the age and growth of immature smooth oreo Pseudocyttus maculatus Gilchrist 1906 (Oreosomatidae) in the Falkland Islands region of the South Atlantic. / George, MJA; Jackson, George D; Green, C. P. et al.
In: Polar Biology, Vol. 19, No. 5, 04.1998, p. 330-335.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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@article{6eef86fc20f34c08855248961dc85f9c,

title = "Preliminary estimates of the age and growth of immature smooth oreo Pseudocyttus maculatus Gilchrist 1906 (Oreosomatidae) in the Falkland Islands region of the South Atlantic",

abstract = "Sectioned otoliths were used to estimate the age of 29 specimens of the smooth oreo (Pseudocyttus maculatus Gilchrist 1906) from the Falkland Islands region of the South Atlantic. This represents the first ageing study of this species in this region of the world. All specimens were immature (sub-adults), the largest having a maximum total length of 347 mm. Growth increments were observed in sectioned otoliths and assumed to be annual in periodicity. The maximum age estimate of individuals in this study was 20 years and the form of somatic growth was similar to previous research on this species from Australian waters. The otolith microstructure consisted of an inner, mostly opaque zone with wide increments followed by an outer, mostly translucent zone with narrower increments. It is suggested that these zones correspond to the two growth phases in the life history of this species, namely the pelagic juvenile phase (opaque zone) and the demersal sub-adult/adult phase (translucent zone).",

keywords = "Microstructure, Life History, Growth Phase, Ageing Study, Preliminary Estimate",

author = "MJA George and Jackson, {George D} and Green, {C. P.} and Robertson, {S. G.}",

year = "1998",

month = apr,

doi = "10.1007/s003000050254",

language = "English",

volume = "19",

pages = "330--335",

journal = "Polar Biology",

issn = "0722-4060",

publisher = "Springer",

number = "5",

}

RIS

TY - JOUR

T1 - Preliminary estimates of the age and growth of immature smooth oreo Pseudocyttus maculatus Gilchrist 1906 (Oreosomatidae) in the Falkland Islands region of the South Atlantic

AU - George, MJA

AU - Jackson, George D

AU - Green, C. P.

AU - Robertson, S. G.

PY - 1998/4

Y1 - 1998/4

N2 - Sectioned otoliths were used to estimate the age of 29 specimens of the smooth oreo (Pseudocyttus maculatus Gilchrist 1906) from the Falkland Islands region of the South Atlantic. This represents the first ageing study of this species in this region of the world. All specimens were immature (sub-adults), the largest having a maximum total length of 347 mm. Growth increments were observed in sectioned otoliths and assumed to be annual in periodicity. The maximum age estimate of individuals in this study was 20 years and the form of somatic growth was similar to previous research on this species from Australian waters. The otolith microstructure consisted of an inner, mostly opaque zone with wide increments followed by an outer, mostly translucent zone with narrower increments. It is suggested that these zones correspond to the two growth phases in the life history of this species, namely the pelagic juvenile phase (opaque zone) and the demersal sub-adult/adult phase (translucent zone).

AB - Sectioned otoliths were used to estimate the age of 29 specimens of the smooth oreo (Pseudocyttus maculatus Gilchrist 1906) from the Falkland Islands region of the South Atlantic. This represents the first ageing study of this species in this region of the world. All specimens were immature (sub-adults), the largest having a maximum total length of 347 mm. Growth increments were observed in sectioned otoliths and assumed to be annual in periodicity. The maximum age estimate of individuals in this study was 20 years and the form of somatic growth was similar to previous research on this species from Australian waters. The otolith microstructure consisted of an inner, mostly opaque zone with wide increments followed by an outer, mostly translucent zone with narrower increments. It is suggested that these zones correspond to the two growth phases in the life history of this species, namely the pelagic juvenile phase (opaque zone) and the demersal sub-adult/adult phase (translucent zone).

KW - Microstructure

KW - Life History

KW - Growth Phase

KW - Ageing Study

KW - Preliminary Estimate

U2 - 10.1007/s003000050254

DO - 10.1007/s003000050254

M3 - Journal article

VL - 19

SP - 330

EP - 335

JO - Polar Biology

JF - Polar Biology

SN - 0722-4060

IS - 5

ER -

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