Age and growth of yellowfin tuna (Thunnus albacares) in the western equatorial Atlantic, using dorsal fin spines

Age and growth of three coastal-pelagic tunas (Actinopterygii: Perciformes: Scombridae) in the Florida Straits, USA: blackfin tuna, Thunnus atlanticus, little tunny, Euthynnus alletteratus, and skipjack tuna, Katsuwonus pelamis

“…For the most part, the individuals in the sample were fairly young, but there were a few handfuls of individuals on the older side of the spectrum. All three of the species were observed to form two bands per year, which has also been observed in small tunas by other studies (Chi and Yang 1973, Johnson 1983, Lessa and Duarte-Neto 2004.…”

“…The darker color was most likely due to a higher density than the opaque bands and corresponding to a slower growth period (Campana 2001). Marginal increment analysis (MIA) was done via measurements from the core to the edge of the otoliths and complete bands in the otoliths (Lessa andDuarteNeto 2004, Zaboukas andMegalofonou 2007). Each otolith was read twice by the same reader, a month apart, Age and growth of three coastal tunas 203 without knowledge of the fish size, sex, catch date, or any previous readings (Gillanders et al 1999).…”

“…where OD is the distance to the edge of the otolith lengthwise, D n is the distance to the last completed hyaline band, and D n -1 is the distance to the previous completed band ( Lessa andDuarte-Neto 2004, Zaboukas andMegalofonou 2007). The MIR was plotted against calendar quarter as well as month to determine the time of band formation (Das 1994).…”

Growth and mortality rates of yellowfin tuna, Thunnus albacares (Perciformes: Scombridae), in the eastern and central Pacific Ocean

“…Age and growth information of yellowfin tuna can be obtained from a variety of techniques such as (a) length modes (MOORE 1951, YABUTA & YUKINAWA 1957, 1959, HENNEMUTH 1961, YOKOTA et al 1961, DAVIDOFF 1963, LE GUEN & SAKAGAWA 1973, FONTENEAU 1980, WANKOWSKI 1981, WHITE 1982, YESAKI 1983, INGLES & PAULY 1984, (b) weight modes (KIMURA 1932, MOORE 1951 and (c) direct aging of calcified tissues such as otoliths (UCHIYAMA & STRUHSAKER 1981, WILD 1986, YAMANAKA 1990, scales (NOSE et al 1957, YABUTA et al 1960, YANG et al 1969, LE GUEN & SAKAGAWA 1973, DRAGANIK & PELCZARSKI 1984, LESSA & DUARTE-NETO 2004 and vertebrae (AIKAWA & KATO 1938, TAN et al 1965. Although the latter two methods are more precise, they are expensive, labor intensive and time consuming (KOLDING & GIORDANO 2002).…”

Age and Growth of an Endemic Cyprinid Fish,Spinibarbus yunnanensis, from Lake Fuxian, China

“…The sections closest to the base, ranging from 0.75 to 1 mm in thickness, provided the best contrast of growth zones. These were mounted on glass slides with a synthetic resin and viewed with transmitted light (Lessa and Paulo 2004).…”