Economic contribution and attitude towards alien freshwater ornamental fishes of pet store owners in Klang Valley, Malaysia

Malaysia is one of the top ten countries in the world that produce freshwater ornamental fishes. This industry can offer better livelihood opportunities to many poor households. However, most of the produced ornamental fishes are alien to Malaysia. In this study, we explore the contribution of alien freshwater fishes to the income of ornamental fish store owners and their attitude towards alien freshwater fishes within Klang Valley, Malaysia. Using a structured questionnaire, we surveyed 70 pet stores out of which 54 (81.42%) store owners responded. Most of the pet store owners were male (72%), Chinese (83%), and the highest educational level was at the secondary level (79%). Most of the pet store owners reported a monthly income of RM 2001–RM 5000 (78%) and were married (73%). Using Chi-square (χ2) test, significant relationships (p < 0.05) existed between the attitude of store owners towards alien ornamental fish species versus educational level (χ2 = 16.424, p = 0.007) and contribution of alien ornamental fishes to the pet store owners’ income (χ2 = 27.266, p = 0.003). Fish sales as the main income source also related significantly with the impact of fish selling business on income level (χ2 = 10.448, p = 0.007). This study showed that the ornamental fish sales contributed over half of the income (51–100%) from the businesses of store owners. Almost half of the respondents (42%) reported that alien ornamental fish was the highest contributor to their income from the ornamental fish sale. While the mismanagement of alien ornamental fishes could give various negative ecological impacts, the socio-economic benefits of these fishes cannot be denied.


INTRODUCTION
Ornamental fishes are frequently referred to as "living jewels" due to their beautiful colours, varying shapes, entertaining behaviours, and the capability of living in confined spaces (Ng, 2016;Lokman et al., 2019). Moreover, these fishes can offer better livelihood opportunities to many low-income families around the world (Cagauan, 2007).
Klang, Petaling Jaya, Shah Alam and Subang Jaya (Rashid & Ishak, 2009). This area was selected as a result of being urbanized and with a large population of over 4 million people which represents about 16% of the entire country's population (Naji et al., 2014). It also houses many freshwater ornamental fish stores. This study primarily surveyed all identified and accessible ornamental fish pet stores within Klang Valley and took place throughout the year 2019.

Questionnaire development and scope
A questionnaire with two sections about demographics (six questions) and socioeconomic aspects of alien freshwater ornamental fish species trade in Klang Valley (15 questions) was developed, all resulting in 21 questions (Supplemental File 1). Questions included dichotomous (yes/no), open-ended (with undefined answering categories), Likert-type (from 1 = ''strongly disagree'' to 4 = ''strongly agree'') and multiple-choice responses. To double-check the contribution of ornamental fish to the income of store owners, the same question addressing this was asked in two different ways; one as a dichotomous question and the other as a Likert-type question. The Malay language version of the questionnaire was also prepared through a forward and backward translation of the English language questionnaire.
In the questionnaire, six questions gathered responses on the sociodemographic characteristics of the respondents, including their gender, age group, ethnicity, education, monthly income, and marital status. There were three Likert-type statements with two questions related to the economic contribution of alien ornamental freshwater fish and one related to the attitude of respondents concerning the alien ornamental freshwater fish trade and culture in Malaysia. Two multiple choice-questions were related to information about the fish business, and the number of years respondents had spent in the business, respectively. Three dichotomous questions addressed the sale of non-fish aquarium accessories, fish sales as the main income source, and fish breeding activity.
Finally, seven open-ended questions addressed income information, most frequently purchased fish species, percentage of income from the fish selling business, number of fish species available for sale, number of fish sold daily, and amount of money made daily from the fish sale, respectively.
Face and content validation were assessed by three experts in the area of fish ecology. The questionnaire was revised several times based on recommendations until the final version was ready to be used.

Data collection
Data were collected from the ornamental fish store owners within Klang Valley, Malaysia. Since there was no official sampling frame to determine the total number of stores within the sampling area, this study relied on data from the Department of Fisheries, Ministry of Agriculture and Food Industries, Malaysia and Google maps to collate and locate all available pet stores in the area. At the end of the survey, 54 (81.42%) out of 70 ornamental fish pet stores agreed to respond to the questionnaire. In each pet store, the questionnaire was administered face to face to the owner or a representative of the owner.
The list of alien and native ornamental freshwater fish species recorded from pet stores within the sampling area as listed by Saba et al. (2020a).

Data analysis
Descriptive statistics were carried out using Microsoft Office Excel (Version 2016, Microsoft Corp., Berkshire, UK), while inferential statistical analyses including Spearman's rank correlation and Chi-square (χ 2 ) test of association were done using Statistical Package for Social Sciences (SPSS) (version 22; Armonk, NY, USA). Spearman's rank correlation was used to identify relationships between the socioeconomic characteristics of store owners and their businesses.
After cleaning, coding, and describing the data using Microsoft Office Excel, Spearman's rank correlation identified variables that had significant correlation (p < 0.05). Furthermore, the influence of demographic characteristics on the attitude of store owners was tested by subjecting data to the Chi-square (χ 2 ) test of association (p < 0.05). The same test was also used to identify associations between store owners' attitudes to alien fish in Malaysia with other socioeconomic characteristics. In the same vein, a Chi-square test was conducted to identify possible associations between the income level of store owners with other socioeconomic characteristics.

Sociodemographic profiles and response summary
Most of the pet store owners were male (72%), Chinese (83%), and educated at the secondary level (79%). Also, most of them are married (73%), obtained a monthly income between RM 2,001 and RM 5,000 (78%), and fall between the age of 26-35 (31%) (Fig. 1). A summary of responses to questionnaire items by categories of the ornamental fish store owners is presented in Fig. 2. Concerning the percentages of the most purchased fishes by origin (native or alien) at first and second mentions by the respondents, alien freshwater fishes occurred most frequently in both cases at 83% and 52%, respectively (Fig. 3).

Correlational analysis
Out of the 11 significant relationships (p < 0.05) between pairs of items measuring the economic contribution of alien fishes and store owners' attitudes towards alien fishes in Malaysia, eight relationships showed moderate (r = 0.300-0.700) with positive correlations. However, out of the other significant relationships that were weakly correlated, only the number of available alien fishes correlated negatively with the number of years in business (r = −0.300; p = 0.040) ( Table 1).

Attitude regarding alien fish species
Except for the educational level where most of those in the secondary (79%) category agreed and strongly agreed as opposed to 55% of those in the bachelor's category that agreed, with a statistically significant difference (χ 2 = 16.424, p = 0.007), all other demographic characteristics such as gender, age and ethnicity showed no significant differences (p > 0.05) among the demographic categories (Table 2).
Concerning the comparison of store owners' attitude towards alien fish species with the number of years in business, fish sale as the main source of income, fish mostly purchased by origin (native or alien), contribution of fish business to income level, percentage of income from freshwater ornamental fish sales, and the contribution of alien freshwater ornamental fishes to income from fish sales, significant differences (p < 0.05) were observed only in the numbers of years in business (χ 2 = 20.372, p = 0.009), and contribution of alien freshwater ornamental fish to fish income (χ 2 = 27.266, p = 0.003) ( Table 3).

Chi-square comparison of income versus other socioeconomic characteristics
Regarding the comparison of alien freshwater ornamental fish contribution to income from fish sale with the number of years in business, monthly income, fish sales as the main source of income, fish mostly purchased by origin (native or alien), the impact of fish business on income level, percentage of income from fish sales, significant differences were observed only for fish sales as the main income source (χ 2 = 10.448, p = 0.007) and impact of fish business on income level (χ 2 = 22.378, p = 0.004) ( Table 4).

DISCUSSION
This study explores, correlates, and compares the aspects of socioeconomic characteristics of ornamental pet store owners and their businesses, and their attitudes towards alien  particularly the ornamental fish breeding, exportation, and marketing (Keong, 2012).
In this study, for most aquarium store owners (58%) in Klang Valley, fish sales contribute over half of the income (51-100%) from their business, and alien freshwater ornamental fishes contribute the most to the income from the ornamental fish sale for about 42% of the respondents. However, since our aim was not to compare the pricing of alien versus native fishes, data on the comparative costing was not recorded in this study. Direct relationships existed between the store owners' socioeconomic characteristics with the sales of alien freshwater ornamental fishes. For example, the main source of income was positively correlated with the contribution of alien freshwater ornamental fish to income generation. This means that income from alien freshwater ornamental fish sales increases as the income from general fish sales by the store owners increased. The high percentage of alien fish mentioned as the most purchased fish, compared to native fish mentions by the store owners confirmed their contribution to the income from alien ornamental fish sales. This is in line with the fact that most of the fish species in Malaysia's ornamental fish business are alien (about 74%) and in the year 2018 alone, the ornamental fish produced in Malaysia was valued at over RM 350 million (Kechik, 1995;DOF, 2007DOF, , 2018. In Malaysia, by the year 2006, there were about 500 aquarium stores in the country with about 550 varieties (native and alien) of ornamental fishes comprising more than 250 Table 3 Chi-square (χ 2 ) test of association between attitude towards alien freshwater ornamental fish species versus other socioeconomic characteristics of aquarium store owners in Klang Valley, Malaysia. species being bred. This fact supports the establishment and acceptability of the retail ornamental fish business and its potential to contribute meaningfully to the livelihoods of Malaysia (Keong, 2012). Despite that, the acceptability of the aquarium hobby and possible dumping of alien fish species into local waters may negatively impact freshwater biodiversity, environment and lead to the co-introduction of parasites and diseases (Trujillo-González et al., 2019;Saba et al., 2020a). The educational level seems to be the most important factor influencing the attitude of the store owners. This follows the finding of Aminrad, Zakaria & Hadi (2011), who Table 4 Chi-square (χ 2 ) test of association between alien freshwater ornamental fish income contribution versus other socioeconomic characteristics of aquarium store owners in Klang Valley, Malaysia. identified that age and educational level influenced environmental awareness. This is likely because those with a higher educational background are more likely to have the opportunity of being exposed to information regarding the need for conservation making them better informed compared to the less educated individuals (Clusa et al., 2018). In this study, the high proportion of respondents in the Bachelor's category (>50%) who agreed that alien fishes should be allowed in Malaysia may be due to the low representation of this category in the sample. Furthermore, they may have been influenced by the fact that they gain economically from the sale of these fishes. This finding is also in tandem with Oxley, Waliczek & Williamson (2016), who found a significant association between educational level and membership of environmental organizations. The significant association between the store owners' attitudes concerning alien freshwater ornamental fish in Malaysia and the contribution of alien fishes to their income signifies that those who benefit more from alien fishes are in greater support of allowing alien fishes to be cultured and traded in Malaysia. This also gives an idea of the importance of alien fishes in their business (Ng, 2016). Besides, the significant association that existed between their attitude and the number of years in business indicates that those with more experience have likely gained a better understanding of the positive economic gains of the alien fishes. There was a significant relationship between attitude and educational level, and most of those who agreed that alien fishes should be allowed in Malaysia (79%) had secondary level education. This signifies the possibility that they probably are less knowledgeable of the existing or potential negative ecological impacts or believe that such impacts are not enough reason to disallow them considering the economic benefits they gain from them.

Years in business
The significant associations between store owners' monthly incomes versus fish sales as the main source of income and contribution of fish business to income level signify the importance of the fish component of their businesses. Moreover, alien ornamental fish species generally contribute to a good proportion of their fish income. Most of the store owners who answered "yes" to whether fish is the main source of income also agreed that alien fishes should be allowed in Malaysia and vice versa. This shows the importance of alien freshwater ornamental fish to the business of that section of the respondents. Besides, the negative relationship as observed between the numbers of available alien fishes versus years in business may be an indication that those who have stayed longer in the business are probably more aware or more concerned about the potential negative impacts of alien fishes.

CONCLUSION
In conclusion, the ornamental freshwater fish industry within Klang Valley is dominated by alien fishes which contribute over half of the income (51-100%) to the businesses of store owners, while most (78%) of the store owners earned between RM 2001 and RM 5000 of income/month. Moreover, the alien ornamental fishes contribute the most to the income from the ornamental fish sale of about 42% of the store owners. Interestingly, we also found that educational level directly influences the environmental awareness toward alien ornamental fish culture and sale in Malaysia. While the mismanagement of alien ornamental fishes could give various negative ecological impacts, the socio-economic benefits of the alien ornamental fishes also cannot be denied. Although this study took place within Klang Valley, which is the most densely populated area within Malaysia and where the highest number of ornamental fish stores can be found, the results as interpreted in this study may be different for other parts of the country. Finally, considering their importance, future studies should also consider the economic contribution of alien fishes to the businesses of fish farmers and fisherfolks, and their attitude towards the importation, breeding culture, and sales of these fishes.