History of Pearling in La Paz Bay, South Baja California

Cariño, Micheline; Monteforte, Mario

doi:10.5741/gems.31.2.88

Cited by 20 publications

(19 citation statements)

References 4 publications

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“…Pearl oysters in the genus Pinctada are also diverse: P. chemnitzi , P. fucata , P. maculata , P. margaritifera , P. maxima , P. nigra , and P. sugillata occur in Taiwan 1 . Some of these species, particularly those of medium to large size, are important because of their commercial value in the pearl culture industry in the Indo‐West Pacific region: Pinctada fucata is used in Iran, Sri Lanka, India, Thailand, China, Korea, Japan, and Mexico; Pinctada margaritifera in Sudan, Australia, French Polynesia, Cook Islands, the Philippines, China, Korea, Japan, and Mexico; and P. maxima in Australia, Burma, Malaysia, Indonesia, and the Philippines 2,3 …”

Section: Introductionmentioning

confidence: 99%

Growth of wild pearl oysters Pinctada fucata, Pinctada margaritifera and Pinctada sugillata (Bivalvia: Pteriidae) in Taiwan

2007

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In order to understand growth features of pearl oysters in the genus Pinctada, i.e. Pinctada fucata, Pinctada margaritifera, and Pinctada sugillata in Taiwan, a total of 3062 wild individuals of these species from juvenile to adult were collected monthly from March 2001 to April 2002 in Jukeng, Pingtung County, south-west Taiwan. Quantitative measurements of live oysters were conducted for shell height (SH), shell length (SL), shell width (SW), hinge length (HL), and wet weight (WW). Different cohorts were identified through multiple length frequency analysis on SH of P. fucata and P. margaritifera, and growth curves with seasonal variation were estimated for these species. Pinctada fucata in Taiwan had a different seasonal growth pattern from the Japanese population, but had similar growth rates during the high growth period. The growth rate of P. margaritifera in Taiwan was slower than in French Polynesia, the Solomon Islands, and the Red Sea. Comparisons of morphological growth features among the three species show large differences in the SW-related features. Pinctada fucata in Taiwan had larger SW than in Japan and Korea. The differences in growth rates and morphological features suggested that the wild Taiwanese oysters may retain genetically pristine characteristics, thus genetic conservation might be urgently needed.

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Section: Introductionmentioning

confidence: 99%

Growth of wild pearl oysters Pinctada fucata, Pinctada margaritifera and Pinctada sugillata (Bivalvia: Pteriidae) in Taiwan

2007

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“…The violet, blue, yellow, and green iridescent overtones seen in the Mexican cultured pearls are produced by interference, as light passes through and is reflected from the alternating thin layers of aragonite and conchiolin (Fritsch and Rossman, 1988). The iridescent colors exhibited by our samples are very similar to those of natural pearls from the Gulf of California (Cariño and Monteforte, 1995) and, in some cases, comparable to the colors of natural abalone pearls (e.g., Wentzell, 1998). The calcite and aragonite constituents are produced by the same external mantle tissue, but at different times.…”

Section: Discussionmentioning

confidence: 50%

“…One identification tool is the fluorescence to long-wave UV radiation. The red fluorescence typical of natural (Cariño and Monteforte, 1995) and cultured pearls from the Gulf of California is not seen in those artificially colored by organic dye or irradiation, which are either inert or display a weak white fluorescence.…”

Section: Separation From Artificially Colored Black Pearlsmentioning

confidence: 94%

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Cultured Pearls from the Gulf of California, Mexico

Kiefert¹,

Moreno²,

Arizmendi³

et al. 2004

Gems & Gemology

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Black pearls have been found in Mexico's Gulf of California since the area was settled more than 2,000 years ago. Attempts at culturing pearls in this area have met with varying success over the past century. Today, a pearl farm in Guaymas is producing commercial quantities of mabe as well as bead-nucleated full-round cultured pearls from the indigenous pearl oyster Pteria sterna. This article provides an overview of the history of natural and cultured pearls from Mexico, describes pearl culturing at the Guaymas farm, and focuses on the properties of bead-nucleated cultured pearls from P. sterna. These cultured pearls have a brown or gray to dark gray bodycolor with various interference colors caused by the stacking of platy aragonite crystals and organic matter. One indication of their natural color (and their Mexican provenance) is a red fluorescence to long-wave UV radiation.

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“…Because the harvested spat is still small and fragile, the nursery culture constitutes a well‐defined stage in the culture process of our local pearl oyster species. The need to introduce a nursery culture stage had been underlined since the early twentieth century by Don Gaston Vives, during the first world‐wide commercial culture experience of a pearl oyster species ( P. mazatlanica ) in his enterprise, the ‘Compañía Criadora de Concha y Perla de Baja California, S.A.’s (1903–14) (Vives 1908; Cariño & Monteforte 1995; 1999; Cariño 1998).…”

Section: Discussionmentioning

confidence: 99%

Growth and survival of the Calafia mother-of-pearl oyster Pinctada mazatlanica (Hanley 1856) under different sequences of nursery culture-late culture at Bahía de La Paz, Baja California Sur, México

Monteforte¹,

Morales‐Mulia²

2000

Aquaculture Research

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The Calafia mother‐of‐pearl oyster, Pinctada mazatlanica (Hanley), and the Rainbow nacre shell, Pteria sterna (Gould), represent an important resource for México because of their potential in pearl production. The present work deals with the effect of different sequences of nursery culture‐late culture on growth and survival of P. mazatlanica, from September 1993 to October 1994. The collected spat presented two main size groups: small (mean shell height of 7 mm), and large (13 mm). They were arranged into four experimental batches for each size group at a constant stocking density of 40–45 juvenile pearl oysters per Nestier cage. Three batches remained in nursery culture for 2, 4 and 6 months respectively, after which they were transferred to late culture in rail cages. A control group remained in nursery culture for 12 months. Growth was evaluated monthly and compared through anova and HSD Tukey tests. In addition to the shell height, width, depth (mm) and weight (g), data of shell volume (height × width × depth, in mm3) was also introduced to estimate and compare growth among the experimental groups. Mortality was estimated by counting the dead specimens every month and obtaining the percentage from a 100% initial survival at the start of the experiment. The juveniles showed different responses to the change from nursery culture to late culture; the level of each response varied significantly among the experimental groups at the end of the study. It seemed that a 6‐month period for nursery culture was propitious for P. mazatlanica.

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History of Pearling in La Paz Bay, South Baja California

Cited by 20 publications

References 4 publications

Growth of wild pearl oysters Pinctada fucata, Pinctada margaritifera and Pinctada sugillata (Bivalvia: Pteriidae) in Taiwan

Growth of wild pearl oysters Pinctada fucata, Pinctada margaritifera and Pinctada sugillata (Bivalvia: Pteriidae) in Taiwan

Cultured Pearls from the Gulf of California, Mexico

Growth and survival of the Calafia mother-of-pearl oyster Pinctada mazatlanica (Hanley 1856) under different sequences of nursery culture-late culture at Bahía de La Paz, Baja California Sur, México

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